Question 1

Which of the following ions has the same electron configuration as neon ($$\mathrm{Ne}$$)?

Accepted Answer

$$\mathrm{Na^+}$$

Question 2

Given that aluminum ($$\mathrm{Al}) $$loses electrons, what positive charge would you expect it to form?

Accepted Answer

$$3^+$$

Question 3

Which of the following ions is isoelectronic with $$\mathrm{Ar}$$?

Accepted Answer

$$\mathrm{K^+}$$

Question 4

Which of the following has the largest ionic radius?

Accepted Answer

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

Question 5

Which of the following atoms or ions has the smallest radius?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$}$$

Question 6

Which of the following ions has the highest first ionization energy?

Accepted Answer

$$\mathrm{Ne}$$

Question 7

What is the abbreviated electron configuration for $$\mathrm{Ca$$^{2+}$$}$$?

Accepted Answer

$$[\mathrm{Ar}]$$

Question 8

How many unpaired electrons does $$\mathrm{Rh$$^{3+}$$}$$ have?

Accepted Answer

3

Question 9

Which of the following ions is isoelectronic with $$\mathrm{Kr}$$?

Accepted Answer

$$\mathrm{Br^-}$$

Question 10

Which of the following correctly lists the ions in order of increasing radius?

Accepted Answer

$$\mathrm{Na^+} \u003c \mathrm{K^+} \u003c \mathrm{Rb^+}$$

Question 11

Which of the following ions has the same number of electrons as $$\mathrm{Ca$$^{2+}$$}$$?

Accepted Answer

$$\mathrm{Ar}$$

Question 12

Which of the following ions would you expect to have the smallest radius?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$}$$

Question 13

Which of the following ions is isoelectronic with $$\mathrm{S$$^{2-}$$}$$?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$}$$

Question 14

Which of the following atoms or ions has the highest first ionization energy?

Accepted Answer

$$\mathrm{Ne}$$

Question 15

Which of the following ions has the electron configuration $$[\mathrm{Ar}]3d$$^{10}$$4s^2$$ $$4p^6$?

Accepted Answer

$$\mathrm{Br^-}$$

Question 16

Which of the following ions is expected to have the greatest number of unpaired electrons?

Accepted Answer

$$\mathrm{Fe$$^{2+}$$}$$

Question 17

Which of the following ions is isoelectronic with $$\mathrm{Na^+}$$?

Accepted Answer

$$\mathrm{Ne}$$

Question 18

Which of the following ions would you expect to have the largest radius?

Accepted Answer

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

Question 19

Which of the following ions has the electron configuration $$[\mathrm{Ne}]$$?

Accepted Answer

$$\mathrm{Na^+}$$

Question 20

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

Accepted Answer

$$\mathrm{K^+}$$

Electron Configurations of Ions and Periodic Trends

Study Guide - Practice Questions