Question 1

Which of the following best describes the process by which a sodium atom becomes a sodium ion?

Accepted Answer

It loses one electron to form a cation with a charge of $$+1.$$

Question 2

What is the correct formula for the compound formed between calcium ions and nitrate ions?

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 3

Which of the following ions has the electron configuration $$1s^2$$ $$2s^2$$ $$2p^6$$?

Accepted Answer

$$\mathrm{N$$^{3-}$$}$$

Question 4

A lead atom loses four electrons. What is the name and symbol of the resulting ion?

Accepted Answer

Lead(IV) ion, $$\mathrm{Pb$$^{4+}$$}$$

Question 5

Which of the following is a property of ionic compounds?

Accepted Answer

They conduct electricity when dissolved in water.

Question 6

What is the correct name for the compound $$\mathrm{K_3PO_4}$$?

Accepted Answer

Potassium phosphate

Question 7

Which of the following correctly matches a polyatomic ion with its formula?

Accepted Answer

Sulfite: $$\mathrm{SO_3$^{2-}}$$

Question 8

Which of the following best explains why ionic compounds are generally hard and brittle?

Accepted Answer

Strong electrostatic attractions hold ions in a rigid lattice, and shifting layers brings like charges together, causing repulsion.

Question 9

What is the formula unit for the compound formed between strontium and bromine?

Accepted Answer

$$\mathrm{$$SrBr_2$$}$$

Question 10

Which of the following is the correct electron configuration for $$\mathrm{Ca$$^{2+}$$}$$?

Accepted Answer

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

Question 11

A compound is formed between aluminum and sulfur. What is its correct formula?

Accepted Answer

$$\mathrm{Al_2S_3}$$

Question 12

Which of the following best describes a polyatomic ion?

Accepted Answer

A charged group of covalently bonded atoms.

Question 13

Which of the following is the correct name for $$\mathrm{Fe(NO_2$)_2}$$?

Accepted Answer

Iron(II) nitrite

Question 14

Which of the following best explains the octet rule as it applies to ionic bonding?

Accepted Answer

Atoms tend to gain or lose electrons to achieve eight electrons in their valence shell.

Question 15

Which of the following is the correct formula for potassium phosphide?

Accepted Answer

$$\mathrm{K_3P}$$

Question 16

A fluorine atom gains one electron. What is the name and symbol of the resulting ion?

Accepted Answer

Fluoride ion, $$\mathrm{F^-}$$

Question 17

Which of the following is a binary ionic compound?

Accepted Answer

$$\mathrm{NaCl}$$

Question 18

Which of the following is the correct formula for ammonium carbonate?

Accepted Answer

$$\mathrm{(NH_4$)_2CO_3}$$

Question 19

Which of the following best describes the difference between a monatomic ion and a polyatomic ion?

Accepted Answer

A monatomic ion consists of a single atom with a charge, while a polyatomic ion consists of multiple atoms bonded together with an overall charge.

Question 20

Which of the following is the correct name for $$\mathrm{Mg(OH)_2}$$?

Accepted Answer

Magnesium hydroxide

Intro to Chemistry: Ionic Compounds Study Guide

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