Q: Rank the following elements in order of increasing ionization energy: Br, F, Ga, K, Se.

$\mathrm{K} < \mathrm{Ga} < \mathrm{Br} < \mathrm{Se} < \mathrm{F}$

Question 1

Which of the following ions is both isoelectronic and isotopic with $^{40}\mathrm{Ca}^{2+}$?

Accepted Answer

$^{40}\mathrm{Ar}$

Question 2

A metallic element has a mass number of 65 and 35 neutrons in its nucleus. The cation formed by this atom has 28 electrons. What is the symbol of the cation?

Accepted Answer

$^{65}\mathrm{Zn}^{2+}$

Question 3

Which of the following is the symbol for the ion with a $+4$ charge, $30$ neutrons, and $21$ electrons?

Accepted Answer

$^{51}\mathrm{Mn}^{4+}$

Question 4

How many electrons must a magnesium atom ($Z=12$) lose in order to obtain a filled outer shell?

Accepted Answer

$2$

Question 5

What is the condensed electron configuration for the $\mathrm{Na}^+$ ion?

Accepted Answer

$[\mathrm{Ne}]$

Question 6

Which of the following ions would be unlikely to occur based on ion formation and the Periodic Table?

Accepted Answer

$\mathrm{Rb}^{-}$

Question 7

Predict the charge that a gallium ion would most likely possess.

Accepted Answer

$+3$

Question 8

Which of the following atoms has the smallest ionization energy?

Accepted Answer

$\mathrm{K}$

Question 9

Which element from Group 7A has the lowest ionization energy?

Accepted Answer

$\mathrm{I}$

Question 10

Which of the following has the highest ionization energy?

Accepted Answer

$\mathrm{Ar}$

Question 11

Which of the following halogens will release the most energy with the addition of an electron?

Accepted Answer

$\mathrm{F}$

Question 12

Which atom in the following set has the largest electron affinity: N, O, C, B, Ne?

Accepted Answer

$\mathrm{O}$

Question 13

Arrange the following elements from greatest to least tendency to accept an electron: F, Li, C, O, Be.

Accepted Answer

$\mathrm{F} > \mathrm{O} > \mathrm{C} > \mathrm{Li} > \mathrm{Be}$

Question 14

Which of the following elements would lose an electron the easiest?

Accepted Answer

$\mathrm{Li}$

Question 15

Rank the following elements in order of increasing ionization energy: Br, F, Ga, K, Se.

Accepted Answer

$\mathrm{K} < \mathrm{Ga} < \mathrm{Br} < \mathrm{Se} < \mathrm{F}$

Question 16

Which one of the following atoms has the least tendency to gain another electron?

Accepted Answer

Neon

Question 17

Which of the following ions is isoelectronic with $\mathrm{Cl}^{-}$?

Accepted Answer

$\mathrm{S}^{2-}$

Question 18

What is the electron configuration for the $\mathrm{Cl}^{-}$ ion?

Accepted Answer

$1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^6$

Question 19

Which of the following elements will have the largest atomic radius?

Accepted Answer

$\mathrm{Cs}$

Ions, Electron Configurations, and Periodic Trends: Study Guide for GOB Chemistry

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