Question 1

Which of the following best describes the difference between ionic and molecular compounds?

Accepted Answer

Ionic compounds are composed of ions held together by ionic bonds, while molecular compounds are composed of molecules held together by covalent bonds.

Question 2

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

Accepted Answer

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

Question 3

A sodium atom loses one electron to form a sodium ion. Which of the following statements is correct about the resulting sodium ion?

Accepted Answer

It has 11 protons and 10 electrons, resulting in a $$+1$$ charge.

Question 4

Which of the following is the correct name for $$\mathrm{$$FeCl_2$$}$$?

Accepted Answer

Iron(II) chloride

Question 5

What is the charge on the sulfide ion in $$\mathrm{Na_2S}$$, and how many sodium ions are needed to balance it?

Accepted Answer

The sulfide ion has a $$2-$$ charge, and two sodium ions are needed to balance it.

Question 6

Which of the following formulas represents aluminum oxide?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 7

What is the correct name for $$\mathrm{Cu_2S}$$?

Accepted Answer

Copper(I) sulfide

Question 8

Which of the following ions is a polyatomic ion with a $$-2$$ charge?

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 9

What is the correct formula for tin(IV) chloride?

Accepted Answer

$$\mathrm{$$SnCl_4$$}$$

Question 10

Which of the following compounds contains a transition metal with a variable charge?

Accepted Answer

$$\mathrm{FeO}$$

Question 11

What is the correct name for $$\mathrm{Ca(NO_3$)_2}$$?

Accepted Answer

Calcium nitrate

Question 12

Which of the following is the correct formula for sodium phosphate?

Accepted Answer

$$\mathrm{Na_3PO_4}$$

Question 13

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

Accepted Answer

$$\mathrm{Al_2$(CO_3$)_3}$$

Question 14

Which of the following is the correct name for $$\mathrm{$$SnSO_4$$}$$?

Accepted Answer

Tin(II) sulfate

Question 15

Which of the following ions is the only common positively charged polyatomic ion?

Accepted Answer

$$\mathrm{NH_4$^+}$$

Question 16

What is the correct name for $$\mathrm{Al_2$(SO_4$)_3}$$?

Accepted Answer

Aluminum sulfate

Question 17

Which of the following best explains why ionic compounds have high melting points?

Accepted Answer

They have strong electrostatic attractions between oppositely charged ions.

Question 18

What is the correct formula for nickel(III) oxide?

Accepted Answer

$$\mathrm{Ni_2O_3}$$

Question 19

Which of the following is the correct name for $$\mathrm{$$FePO_4$$}$$?

Accepted Answer

Iron(III) phosphate

Question 20

Which of the following is the correct formula for copper(I) oxide?

Accepted Answer

$$\mathrm{Cu_2O}$$

Ionic and Molecular Compounds: Structure, Naming, and Formulas

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