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

$$\mathrm{F} \u003e \mathrm{O} \u003e \mathrm{C} \u003e \mathrm{Li} \u003e \mathrm{Be}$$

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

$$\mathrm{K} \u003c \mathrm{Ga} \u003c \mathrm{Br} \u003c \mathrm{Se} \u003c \mathrm{F}$$

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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