A. nd = (n+1)s B. nd < (n+1)s C. nd > (n+1)s D. It is This problem has been solved! The f/-block elements are classified in 3d, Ad, 5d and 6d series.. Ni(II): The ion is Ni, so it has lost 2 valence electrons. Atomic #/Symbol Electronic Configuration 37 Rb [Kr] 5s1 38 Sr [Kr] 5s2 39 Y [Kr] 5s2 4d1 40 Zr [Kr] 5s2 4d2 41 Nb [Kr] 5s2 4d3 42 Mo [Kr] 5s2 4d4 43 Tc [Kr] 5s2 4d5 44 Ru [Kr] 5s2 4d6 45 Rh [Kr] 5s2 4d7 46 Pd [Kr] 5s2 4d8 Electronic structure Crystal Field Theory: an electrostatic approach to understand d-orbital complexes. EAN = Z-n + 2C.N. Such elements in this table are listed twice. d-metal complexes: electronic structures and properties Recall the shape of the d-orbitals. 2 The element nickel has in the lowest state the electronic configuration The shell number is followed by the letter of the sub-shell, with the number of electrons in the shell indicated by a superscript number. The electronic configuration of each element is decided by the Aufbau principle which states that the electrons fill orbitals in order of increasing energy levels. Palladium is a transition metal element. Comparison of the nickel group dimers to the coinage metal dimers sheds light on the d orbital contribution to the metal bonding in the nickel . Voltammetric studies of . At the time of filling, 4s orbital was filled first as there was drop in the energy of 45 and then comes the turn of 3 d orbital. Q. 60 seconds . 4 that the "electron-rich" stepped Ni surface, . Abstract: Modified embedded atom method (MEAM) potentials for fcc elements Cu, Ag, Au, Ni, Pd, Pt, Al, and Pb have been newly developed using the original first nearest-neighbor MEAM and the recently developed second nearest-neighbor MEAM formalisms.It was found that the original MEAM potentials for fcc elements show some critical shortcomings such as structural instability and incorrect . For 1, it is well known that, under pressure, the orbitals with higher angular momentum become favorablehence, atoms typically undergo s - p and s - d transitions ( 1, 22 ). Electronic Configuration of Transition Metal Ions Metals can only lose electrons to form cations. In this study, we examine the adsorptions of Ni, Pd, and Pt clusters on C 60 by using a computational approach. Possible oxidation states are +2,4. The chemical symbol for Platinum is Pt. History. One-electron-oxidized 1b was isolated as [Ni(tbu-salcn)]NO3 (4) having the Ni(II)phenoxyl radical ground state. There are significant variations in the electron affinities of Pt (247 kJ/mol [39]), Pd (98 kJ/mol [39]) and Ni (156 kJ/mol [39]). Geology. There is a second factor involved: Spin-Orbit coupling. The calculations were carried out using Quantum ESPRESSO package within the framework of Density Functional Theory (DFT). This adds up to 12 electrons. EAN = 46-4 + 26 . Nickel Complete Electron Configuration 1s2 2s2 2p6 3s2 3p6 4 s2 3 d8 Abbreviated Electron Configuration [Ar] 3d8 4s2 Sources Chiefly found in pentlandite [(Ni,Fe)9S8] ore. To verify the effects of the adsorption of CH 3 OH molecule on the electronic properties of graphene, the DOS of the molecule-sheet adsorption systems are calculated. The terms low spin and high spin refer to the electronic configurations of particular geomtries of certain d-block metal ions. 2). Six ligands are attached to central metal atom so, coordination number is 6. 1 s: 2 electrons, 2 s: 2 electrons; 2 p: 6 electrons, 3 s: 2 electrons. Pd and Pt . Oxidation potentials from cyclic voltammetry increased along the series Pt < Ni < Pd from 0.15 to 0.74 V. DFT calculations confirmed the essentially ligand-centred *-type . (M = Ni, Pd, Pt, Cu). . Solution. Electron Configuration Postby Chem_Mod Sat Sep 10, 2011 8:32 am. Valence electrons in Nickel (Ni) 10: 29: Valence electrons in Copper (Cu) 11: 30: Valence electrons in Zinc (Zn) 12: 31: . 10 For the OER, besides Ru and Ir, the intrinsic activity follows the trend . E- Configuration Quiz-Original . As shown by the calculated DOS and the energy gaps (E g) between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) in Table 1, the pure sheet is found to be a semi-metallic material . How many different principal quantum numbers can be found in the ground-state electron configuration of nickel? * In presence of strong field CN - ions, all the electrons are paired up. The two main factors that differentiate the Ni(II) complex from the Pd(II) complex are therefore: The $\mathrm{4d}$ orbitals of $\ce{Pd^2+}$ are more radially diffuse (i.e. One-electron-oxidized species of the Pd(II) complexes 2a and 2b were different from those of the Ni(II) complexes, the Pd(II)phenoxyl radical species being the ground state in CH2Cl2 in the range 5300 K. a) Remove ligands in closed shell configuration b) The charge on the metal is the oxidation state [Rh(I)] Ph3P Rh Cl Ph3P PPh 3 Ph3P Rh Cl Ph P PPh3 d-Electron count (dn) n = Valence of neutral metal - charge on the metal Rh(0) has 9 valence electrons, so Rh(I) has (9-1= 8) Rh(I) has 8 d-electrons and is said to be d8 d Total electron count d So the full electron configuration for Palladium would start with: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6. Cr 2+ is d 4, or t 2g 3 e g 1 with LFSE = -6Dq while Mn 2+ is d 5, or t 2g 3 e g 2 with . Answer to Solved Name of coordination complex Formula of Oxidation. 8. Furthermore, we discover that pressure-induced s-d orbital transfer makes Ni, Pd, and Pt "pseudo-noble-gas" atoms with a closed d-shell configuration, and the elements preceding them (Fe and, especially, Co, Rh, and Ir) electron acceptors, while the elements right after them (Cu, Ag, Zn, and Cd) become highly electropositive. The electron configuration describes the distribution of electrons in the shell of an atom at various energy states. 4d10 and the term symbol is 1S0. It provides an approximate description of the electronic energy levels that determine the UV and visible spectra, but does not describe the bonding. This in turn indicates that the ions in crystal lattice have smaller radii than the analogous isolated ions. Unabbreviated electronic configuration of neutral Platinum. The Ni-FePS 3 NSs/C can also deliver 219 mV decrease in overpotential at 10 mA cm 2 for HER when compared with FePS 3 NSs/C. Group 10, numbered by current IUPAC style, is the group of chemical elements in the periodic table that consists of nickel (Ni), palladium (Pd), platinum (Pt), and perhaps also the chemically uncharacterized darmstadtium (Ds). Platinum atoms have 78 electrons. 2 The element nickel has in the lowest state the electronic configuration On the other hand, Hf, Ti and Zr are control variables . Electronic configurations of the elements The ground electronic configurations of the neutral elements used here are obtained from the most recent compilation [1]produced by the NISTAtomic Physics Division. (Ni-,Pd-,Pt-) and isoelectronic heterogeneous transition metal diatomic counterparts (TiO-,ZrO-,WC-) displayed intriguing similarities in both the acquired PADs and BE spectra. These leading valence electron configurations replicate the unique closed d-shell neutral 1 S 0 () . The largest principal quantum number in the ground state electron configuration of platinum (Pt) is: answer choices . Use the electron configuration and/or spectrochemical series to answer the questions asked. One-electron oxidations of 1 and trans-6 yield the diamagnetic dications [cis-[Ni(II)((2)L(ISQ))((2)L(IBQ))](2)]Cl(2) (7) and [trans-[Pt(II)((3)L(ISQ))((3)L(IBQ))](2)](CF(3)SO(3))(2) (8), respectively, which have been characterized by X-ray crystallography; both complexes possess a weak M.M bond and the ligands adopt an eclipsed configuration . Which of the following is the ground state electron configuration of Ni? A) 2 B) 3 C) 4 D) 5 E) 6. Half-filled orbitals and entirely filled d orbitals are both stable for these elements. The electronic configuration of platinum pt is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 1 4f 14 5d 9 or [Xe]6s 1 4f 14 5d 9 Platinum is a lustrous silvery-white, malleable, ductile metal and a member of group 10 of the periodic table of the elements. In the transition metals, the five d orbitals are being filled in, and the elements in general have electron configurations of (n-1)d 1-10 . The electronic configurations of the ground states are tentatively assigned. 78. . Share. ; The atomic orbital depends parametrically on few variables: Report an issue . 195. bigger) and therefore form stronger overlap with the orbitals on $\ce{Cl-}$, as compared to the $\mathrm{3d}$ orbitals of $\ce{Ni^2+}$. Palladium, symbol Pd, has a Face Centered Cubic structure and Silver color. There are 20 elements that do not fill the shells of atoms with electrons according to the procedure discussed above. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. (Ni-,Pd-,Pt-) and isoelectronic heterogeneous transition metal diatomic counterparts (TiO-,ZrO-,WC-) displayed intriguing similarities in both the acquired PADs and BE spectra. Pb2+ would then have an electronic configuration of [Xe]6s2 4f14 5d10 since Pb2+ means that it lost two of its electrons. Tags: . The ground electronic configurations of first cations are in most cases 2-The element nickel has in the lowest state the electronic configuration (3d)8 (4s)2, but states with the configurations (3d)9 . Abstract Read online The structural, electronic, and magnetic properties of three spin configurations of L10-ordered FeM alloys (M = Ni, Pd, or Pt) were studied using the first-principles method. When the neutral atom loses 2 electrons, the electronic configuration is [Ar]3d . No doubt, this is the easiest way to determine which shells are filled with electrons for any element. Oxidation state of Palladium is 4. the observed electronic configuration of platinum z 78 is xe 4f14 5d9 6s1 it has one unpaired electron in its d orbital and one unpaired electron in i - Chemistry - TopperLearning.com | sdqwqw22--> Starting early can help you score better! We show the . ; The function describing the state of a single electron is called orbital.In the case of electrons in a single atom, we say about atomic orbital.If we think about electon inside chemical molecule, we say about molecular orbital. Cyclometalated complexes [M(Phbpy)(CN)] (HPhbpy = 6-phenyl-2,2-bipyridine) of the group 10 metals (Ni, Pd, and Pt) bearing a carbanionic -CNN pincer ligand were synthesized and studied in a combined experimental and computational DFT approach. If playback doesn't begin shortly, try restarting your device. (Pt,Pd,Ni)S] and sperrylite [platinum arsenide, PtAs 2] The platinum metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. The remaining three electrons go into the 3 p orbital, so the complete electron configuration of P is 1 s2 2 s2 2 p6 3 s2 3 p3. The most important properties are 1) the electronic configuration, 2) size, and 3) electronegativity and chemical hardness. The equation is: 1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p. The electron affinities are determined to be EA(Ni 2)=0.9260.010 eV, EA(Pd 2)=1.6850.008 eV, and EA(Pt 2)=1.8980.008 eV. Here we present that replacing the core Au atom with Pd or Pt results in stable [MAu24(SR)18]0 clusters (M = Pd, Pt) having a superatomic 6-electron configuration (1S21P4). The effective atomic number of Pt is 86, which is the electronic configuration of inert gas Radon. These leading valence electron configurations replicate the unique closed d-shell neutral 1 S 0 () . Answer: Pb has an electronic configuration of [Xe]6s2 4f14 5d10 6p2. Platinum is a chemical element with symbol Pt and atomic number 78. Further information is available in inorganic chemistry . You will get the detailed information about the periodic table which will convert a newbie into pro. The ground state electron configuration of ground state gaseous neutral palladium is [ Kr ]. It can be inferred from Fig. Uses. 1). in the transistion elements. The electron configuration for silver (Ag) is based upon the place meant of silver in the fifth row of the periodic table in the 11th column of the periodic table or the 9th column of the transition metal or d block. Electronic Configuration of d-Block Elements The electrical configuration of D block elements is (n-1)d1-10 ns1-2. A sublevel is filled or half-filled before the next sublevel is entered. The ground state electronic configuration of Ni is [Ar]3d 4s . Top. For electronic configurations, where it matters, the values given for octahedral species are low spin unless stated to be high spin. CN # 4 contd. DFT identifies that the strong electronic coupling effect in single-atom Ni-FePS 3 facilitates electron aggregation from Fe atom to the nearby Ni-S bond and enhances the electron-transfer of Ni and S sites, which . The experiments showed only a weak temperature dependence of the contact resistances which indicates that mainly the field emission determines the contact . Tags . 6. a) Remove ligands in closed shell configuration b) The charge on the metal is the oxidation state [Rh(I)] Ph3P Rh Cl Ph3P PPh 3 Ph3P Rh Cl Ph P PPh3 d-Electron count (dn) n = Valence of neutral metal - charge on the metal Rh(0) has 9 valence electrons, so Rh(I) has (9-1= 8) Rh(I) has 8 d-electrons and is said to be d8 d Total electron count d The electronic configurations of the ground states are tentatively assigned. The electronic configuration of chromium, which includes half-filled d and s orbitals in its configuration - 3d 5 4s 1 - is an example of this. All are d-block transition metals. mainly Ni 3d and/or Cu 3d electrons, while the Pd 4d elec- Detailed observation of the present in-house PES results trons dominate (by 70%) the PES spectrum at in Fig. coefficient of the paramagnetic metals Pd and Pt falls below the normal value; and in 6 we discuss the resistance of ferromagnetic metals, and show in 7 qualitatively why constantan (Cu-Ni) has zero temperature coefficient at room temperature. Science; Chemistry; Chemistry questions and answers; Name of coordination complex Formula of Oxidation Electronic Complex/ state configuration complex ion Of Metal Of Metal ion ion ordination number Of Metal ion Naz[Ni(CN)4] [Fe(en)3]C12 K2[Pt(CN)4] [Cu(H20)4Cl]Br [MnCIs(NH3)]NO3 [Pd(CN)6]2- [Ni(CO)4] [Co(en)2Cl2]NO3 [Fe . Then you get to the critical point of deciding whether to fill it in as (4d 8, 5s 2) or (4d 10 ). d8 electron configuration usually leads to square planar geometries (as only one d-orbital required for forming the 4 metal ligand s-bonds) 17 The structural, electronic, and magnetic properties of three spin configurations of L1 0 -ordered FeM alloys (M = Ni, Pd, or Pt) were studied using the first-principles method. Tap to unmute. We systematically investigated a series of one-electron oxidized salen complexes of group 7 metals (Mn(iii), Tc(iii), and Re(iii)) and their group 10 analogues (Ni(ii), Pd(ii), and Pt(ii)) using the general multi-configuration reference quasi-degenerate perturbation theory (GMC-QDPT) which was combined with the three-dimensional reference . Comparison of the nickel group dimers to the coinage metal dimers sheds light on the d orbital contribution to the metal bonding in the nickel . * In [Ni(CN) 4] 2-, there is Ni 2+ ion for which the electronic configuration in the valence shell is 3d 8 4s 0. The table below shows the electrons per shell for each of the 118 known elements. The electronic configuration of platinum (Pt) is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d9 6s1 This can be simplified as: [Xe] 4f14 5d9 6s1. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d9 6s1. Both Pd and Pt substitutions create a mid-gap state around the E F within the 0:00. Copy link. Furthermore, the Pt, Pd and Ni contacts were examined by temperature dependent TLM measurements to get information concerning the current transport mechanism at the p-GaN-metal interface. Electron Configuration of All Elements (Full Chart Inside) Protons . Which two elements have the same ground-state electron configuration? The electron affinities are determined to be EA(Ni 2)=0.9260.010 eV, EA(Pd 2)=1.6850.008 eV, and EA(Pt 2)=1.8980.008 eV. The metal is produced by heating the ore in a blast furnace which replaces the sulfur with oxygen. Calculate the EAN of Palladium in [Pd(NH 3) 6] 4+ complex? Compound properties. 4:42 . Ni Cu; Rh Pd Ag; Ir Pt Au; . The valence shell configuration of transition elements is (//l)r/ 1-10 //^ 12, where n indicates the outermost shell and (-l) indicates the penultimate shell. Know everything about Palladium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure. This is described by the occupied sub-shells. The oxides are then treated with an acid that reacts with the iron not the . Number: Symbol: Name: Electron. On the other hand, relatively small alloying X elements having electron configuration similarities with Ni (i.e., X = Co, Cu, Rh, Pd, Ag, Ir, Pt, or Au) are more likely to worsen bonding strengthening. This notation can be written in core notation or . Palladium atoms have 46 electrons and the shell structure is 2.8.18.18.. 1 indicates that, compared to the Pd40Ni40P20 refer- hm = 50 eV, in addition to the remnants of Ni and/or Cu ence glass, the Pd42.5Ni7.5Cu30P20 glass has the better GFA 3d . Element 46 of Periodic table is Palladium with atomic number 46, atomic weight 106.42. Cu and Ni are independent variables in the compositions, because Cu and Ni have excellent solubility and similar electron configurations. no two elements. To arrive at the electron configurations of atoms, you must know the order in which the different sublevels are filled. In the Periodic Table below, shade all the elements for which the neutral atom has an outer electron configuration of msnd', where n and mare integers, and mn+1. For the ORR, it is revealed that the ORR activity of Pd/C is close to that of Pt/C due to the similar crystal structure and electronic configuration of Pd and Pt, which provides higher volcano-plot activity and better stability than transition metal-based candidates. Therefore the electron configuration for silver must end as 4s 9. Platinum atomic radius is 177 pm, while it's covalent radius is 128 pm. By examining the electron configurations for these elements in the following figure, what can you conclude about the relative energies of the nd and (n+1)s orbitals for this group? To form bonds, the ele- ment rehybridizes (d~s,p electron transfer), and the degree of rehybridization may change when going from pure metallic Pd to a bimetallic system. (a) [Cr(OH 2) 6] 2+ or [Mn(OH 2) 6] 2+ Both complexes have the same ligands, water, which is a weak ligand, so the LFSE is determined by the electron configuration. When the neutral atom loses 2 electrons, the electronic configuration is [Ar]3d . outer-shell d electrons = 6. Atomic Structure of Platinum. The empty 3d, 3s and two 4p orbitals undergo dsp 2 hybridization to make bonds with CN - ligands in square planar geometry. H and He. Question: The elements Ni, Pd, and Pt are all in the same group. 3). This effect is distinct from the simple electro-negativity effect. The quantum state of an electron is described by a mathematical function called wave function. . For example, the s sublevel can only hold two electrons, so the 1 s is filled at . It comes down to stability of the sub-shell and the orbital. These metals share many important physical and chemical . The inset figures show the optimal adsorption configurations of CH and C fragments. Watch later. The exceptional stability of thiolate-protected Au25 clusters, [Au25(SR)18], arises from the closure of superatomic electron shells, leading to a noble-gas-like 8-electron configuration (1S21P6). See the answer Platinum has many uses. You will also get the HD images of the Periodic table (for FREE). The binding energy of Pd and Pt clusters increases as the number of metal atoms . Biology. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. The conjecture is made that a correlation principle may exist . Atomic. Some of these differ from those found in older references. (pt) . H LL Be Na Me Hc B C N O F Ne Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr RU SH Y | 4 Nb Mo Te Ru Rh Pd Ag c In Su Su Te | Xe CBL HET W Re Os Ir Pt Au Hg . 2-The element nickel has in the lowest state the electronic configuration (3d)8 (4s)2, but states with the configurations (3d)9 . The diagram below illustrates the Aufbau rules as they are applied to all the elements. The three complexes [M(Me2dpb)Cl] (M = Ni, Pd, Pt) containing the tridentate N,C,N-cyclometalating 3,5-dimethyl-1,5-dipyridyl-phenide ligand (Me2dpb) were synthesised using a base-assisted CH activation method. Re: What is the e- configuration of PB2+? -Ni(CO) 4 Ni 2+,Pd 2+,Pt2+,Rh + CN # 4 contd. J . All three complexes were crystallographically characterized showing closely packed dimers with head-to-tail stacking and short metal-metal . This is also true for the Pt atom with 5d 9 6s 1. Our calculation results show that the base structure of C 60 can host Ni n /Pd n /Pt n (n=1-4) clusters with good adsorption stability and the complexes establish either two or no unpaired electrons. The calculations were carried out using Quantum ESPRESSO package within the framework of Density Functional Theory (DFT). Info. Atomic number of Palladium is 46. A reverse situation occurs in the case of ions of the electronic configuration of Ni, Pd and Pt atoms: for these configurations, the effective nuclear charges of isolated ions are smaller than for the analogous ions in crystal lattice. C) 4. Ni: {Ar} 3d 8 4s 2 Pd: {Kr} 4d 10 Pt: {Xe} 5d 9 6s 1 Fourth, it is not the case that an electron configuration with a half-filled d or f subshell has a lower energy than one that is one electron away from such a state. We know that completely filling in the 4th shell would make the atom more . The absorption of electrons into the d shell means that, if Ni or Pd contribute electrons to a metallic structure, they also absorb electrons and so act as elements of zero valency or at any rate of very low valency. A) Pd and Pt B) Cu and Ag C) Fe and Cu D) Cl and Ar . We talk about a very special and typical electronic configuration of Pt where almost every argument is found wanting and we are in a very precarious situation as to how to explain the transfer the. 1-In a recent paper* certain properties of the transition metals Ni, Pd, and Pt and of their alloys with Cu, Ag, and Au have been discussed from the point of view of the electron theory of metals based on quantum . In transition elements, electrons can be lost from the outer most and penultimate shells. Electron Configuration of Palladium Pd Lesson. Element reactions. The conjecture is made that a correlation principle may exist . You can effortlessly find every single detail about the elements from this single Interactive Periodic table. Electron Configuration and Oxidation States of Platinum Electron configuration of Platinum is [Xe] 4f14 5d9 6s1. Configuration: Notes: 58: Ce: Cerium [Xe] 4f 1 5d 1 6s 2: 59: Pr: Praseodymium [Xe] 4f 3 6s 2: anomalous configuration: 60: Nd . Shopping. Complete ground state electronic configuration for the Platinum atom, Unabbreviated electronic configuration. 5. coefficient of the paramagnetic metals Pd and Pt falls below the normal value; and in 6 we discuss the resistance of ferromagnetic metals, and show in 7 qualitatively why constantan (Cu-Ni) has zero temperature coefficient at room temperature. tetrahedral geometry is preferred for d 0 or d 10 16 Oxidation state of Ti? 1-In a recent paper* certain properties of the transition metals Ni, Pd, and Pt and of their alloys with Cu, Ag, and Au have been discussed from the point of view of the electron theory of metals based on quantum . Valence electrons: For main group elements (i.e s-block and p-block elements), the valence electrons are the electrons present in the outermost orbit. Electrons enter available sublevels in order of their increasing energy. Instead, these transition X metals creating metallic bondings with NN Ni atoms would contribute to ductility and malleability of Ni-based . The concept of electronic configuration has replaced the older concept of valency and valence electrons. Synthesis, Electronic Structure, and Reactivity of Strained Nickel-, Palladium-, and Platinum-Bridged [1]Ferrocenophanes We systematically investigated a series of one-electron oxidized salen complexes of group 7 metals (Mn(iii), Tc(iii), and Re(iii)) and their group 10 analogues (Ni(ii), Pd(ii), and Pt(ii)) using the general multi-configuration reference quasi-degenerate perturbation theory (GMC-QDPT) which was combined with the three-dimensional reference . In 3d series (first transition series), it contains 10 elements from Sc n to Zn 30 where the last electron fills in 3d orbital and these elements are kept in 4 th . This tendency is greater in Pd and Ni than in Pt. The Pd atom possesses a 4d 10 electronic configuration in which the 4d-orbitals are fully occupied, orbital hybridization with phosphorus atom occurs via the 5s and 5p Pd orbitals. Ag and Au. Atomic Pd has a closed-shell configuration. Binary compounds.
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electronic configuration of ni pd and pt