Question

Identify each element below, and give the symbols of the other elements in its group: (a)...

Identify each element below, and give the symbols of the other elements in its group:

(a) [Ar] 4s2 3d10 4p4

(b) [Xe] 6s2 4f14 5d2

(c) [Ar] 4s2 3d5

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Homework Answers

Answer #1

(a) [Ar] 4s2 3d10 4p4

Se = 34 = [Ar] 4s2 3d10 4p4

VI A group elements

oxygen (O)   = 8

Sulfur (s)       = 16

Selenium (se) = 34

Telurium (Te)    = 52

polonium (PO) = 84

(b) [Xe] 6s2 4f14 5d2

Hf = 72 = [Xe] 6s2 4f14 5d2

IVB group elements

Titanium (Ti)   = 22

zirconium (Zr) = 40

hafnium (Hf)      = 72

Dubnium ( Db) = 104

(c) [Ar] 4s2 3d5

Mn = 25 = [Ar] 4s2 3d5

VIIB

manganese (Mn)   = 25

Technetium (Tc)   = 43

Renium      ( Re) = 75

Bohrium ( Bh)   = 107

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