# Chapter 28 - Quantum Mechanics of Atoms - Questions: 16

a. Group VII b. Group II c. Group VIII d. Group I

#### Work Step by Step

a. Group VII. This is fluorine. The outer electrons are $2s^{2}2p^{5}$. b. Group II. This is magnesium. The outer electrons are $3s^{2}$. c. Group VIII, aka Group 0. This is argon. The outer electrons are $3s^{2}3p^{6}$. d. Group I. This is potassium. The outer electron is $4s^{1}$.

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