Trimester One Exam Review - Question 26 and 27 (HUZZAH!)

Electron Configurations

S^2- = [Ne] 3s² 3p⁶

Pb = [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p²

Au = [Xe] 6s¹ 4f¹⁴ 5d¹⁰

W = [Xe] 6s¹ 4f¹⁴ 5d^5

P = [Ne] 3s² 3p³

Ba²⁺ = [Kr] 5s² 4d¹⁰ 5p⁶

^{Orbital Diagrams}

QUESTION 27:
What generally happens to atomic mass from K to Kr? How do you rationalize what happens to atomic mass between Co, Ni, and Cu?
      a) The amu increases. 
      b) It increases because the most abundant cobalt isotope weighs less than the most abundant copper isotope. It decreases with nickel because it has a light weight isotope that is very abundant.

^{Fellow Readers, enjoy!}

^{Cyrus, please don't  >:(}