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a How many elements occur in the 1st period of the periodic table? 1A 7A 8A. Metals Metalloids I Nonmetals C N O F Ne 38 4B 5B 6B 7B 8B. 18 2B Al Si P S CI Ar K Ca Sc Ti V Cr Mn Fe Co Ni Zn Ga Ge As Se Br Kr Cs Ba La Hf Ta W At Rn Lanthanides Pr Nd Pr 5m E Gd Tb Dy Ho Er TmRb Liu Actinides
a How many elements occur in the 1st period of the periodic table? 1A 7A 8A. Metals Metalloids I Nonmetals C N O F Ne 38 4B 5B 6B 7B 8B. 18 2B Al Si P S CI Ar K Ca Sc Ti V Cr Mn Fe Co Ni Zn Ga Ge As Se Br Kr Cs Ba La Hf Ta W At Rn Lanthanides Pr Nd Pr 5m E Gd Tb Dy Ho Er TmRb Liu Actinides
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Related questions
Give It Some Thought 6.16
Valence electron configurations of the elements.
Part A
The elements Ni, Pd, and Pt are all in the same group. 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?
The elements Ni, Pd, and Pt are all in the same group. By examining the electron configurations for these elements in the following figure, what can you conclude about the relative energies of the and orbitals for this group?
nd > (n+1)s |
nd < (n+1)s |
nd = (n+1)s |
It is impossible to conclude. |
3A 4A 5A 6A 7A He 1314 15 16 17| 5 6 7 8 9 10 ls' 2A Core Li Be Hel 2 11 12 Na Mg3B 4B 5B 6B 7B 8 9 B 2B 13 14 15 16 17 18 Nel 13/13/13 4 5 6 7 ã11 12 19 20 2 22 23 2425 26 27 2829 30 332 33 34 3536 K Ca Sc T VCr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 37 38 39 40 4 443 44 4546 47 48 49 50 5152 53 54 Rb Sr Y Zr Nb Mo TRu Rh Pd Ag Cd In Sn Sb Te I Xe 55 56 772 73 7475 76 77 78 79 80 81 82 83 8485 86 57 5859 60 6 6 63 64 65 66 67 68 69 70 La CePrNd Pm Sm Eu GdTb Dy Ho Er Tm Yb Lanthanide series Xel 89 90 91 92 93 94 95 96 97 9899 100 101 102 Actinide sris AcTh Pa UNp Am Cm Bk CEFm Md No Metals Metalloids Nonmetals 6180 33-21 Sc /4-39 Y