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Chemical Bonds Study Guide — Extracted Questions (Grade 12)

Total questions: 38

Worksheet time: 24mins

Name
Class
Date
1.

What are valence electrons?

a)

Electrons in the innermost energy level that never participate in bonding

b)

Electrons in the outermost energy level that are involved in chemical bonding

c)

Protons in the nucleus that determine atomic number

d)

Neutrons in the nucleus that determine isotopic mass

2.

How many valence electrons does phosphorus have?

a)

3

b)

4

c)

5

d)

6

3.

How many valence electrons does aluminum have?

a)

2

b)

3

c)

4

d)

5

4.

What is an ionic compound?

a)

A compound formed by sharing electrons between nonmetals

b)

A compound formed by electrostatic attraction between cations and anions after electron transfer

c)

A compound consisting only of neutral atoms held by hydrogen bonds

d)

A compound formed exclusively by metallic bonding among metals

5.

In an ionic bond, what happens to the valence electrons?

a)

They are shared equally between atoms

b)

They are shared unequally to form polar covalent bonds

c)

They are transferred from a metal to a nonmetal, forming ions

d)

They move freely through a lattice creating metallic bonding

6.

In a covalent bond, what happens to the valence electrons?

a)

They are transferred from nonmetal to metal

b)

They are shared between atoms, typically between nonmetals

c)

They are lost to form a sea of electrons around cations

d)

They are captured by the nucleus of one atom only

7.

After drawing electron dot structures and showing electron transfer, identify the resulting ionic compound and typical ion charges for the pair: Calcium and Chlorine.

a)

CaCl with Ca+ and Cl−

b)

CaCl2 with Ca2+ and Cl−

c)

Ca2Cl with Ca2+ and Cl2−

d)

CaCl3 with Ca3+ and Cl−

8.

After drawing electron dot structures and showing electron transfer, identify the resulting ionic compound and typical ion charges for the pair: Aluminum and Sulfur.

a)

AlS with Al+ and S−

b)

Al2S3 with Al3+ and S2−

c)

Al3S2 with Al2+ and S3−

d)

AlS2 with Al3+ and S−

9.

After drawing electron dot structures and showing electron transfer, identify the resulting ionic compound and typical ion charges for the pair: Magnesium and Fluorine.

a)

MgF with Mg+ and F−

b)

MgF2 with Mg2+ and F−

c)

Mg2F with Mg2+ and F2−

d)

MgF3 with Mg3+ and F−

10.

After drawing electron dot structures and showing electron transfer, identify the resulting ionic compound and typical ion charges for the pair: Sodium and Phosphorus.

a)

NaP with Na+ and P−

b)

Na3P with Na+ and P3−

c)

NaP3 with Na3+ and P−

d)

Na2P with Na+ and P2−

11.

Name the binary ionic compound with formula KCl.

a)

Potassium chloride

b)

Potassium chlorate

c)

Potassium chlorite

d)

Potassium peroxide

12.

Name the binary ionic compound with formula CaBr2.

a)

Calcium bromide

b)

Calcium dibromate

c)

Calcium bromite

d)

Calcium(II) bromate

13.

Name the binary ionic compound with formula CuS.

a)

Copper(II) sulfate

b)

Copper(I) sulfide

c)

Copper(II) sulfide

d)

Copper sulfite

14.

Name the binary ionic compound with formula PbO2.

a)

Lead(II) oxide

b)

Lead(IV) oxide

c)

Lead(II) peroxide

d)

Lead(IV) peroxide

15.

Select the balanced chemical formula for the binary ionic compound: Calcium Chloride.

a)

CaCl

b)

CaCl2

c)

Ca2Cl

d)

Ca2Cl3

16.

Select the balanced chemical formula for the binary ionic compound: Sodium Phosphide.

a)

NaP

b)

Na3P

c)

Na2P3

d)

NaP3

17.

Select the balanced chemical formula for the binary ionic compound: Ammonium Sulfide.

a)

NH4S

b)

(NH4)2S

c)

NH4S2

d)

(NH4)3S

18.

Select the balanced chemical formula for the binary ionic compound: Iron(II) Oxide.

a)

FeO

b)

Fe2O3

c)

Fe3O4

d)

FeO2

19.

What is a polyatomic ion?

a)

A neutral molecule composed of two atoms

b)

An ion formed when a single atom loses or gains electrons

c)

A charged group of covalently bonded atoms acting as a single ion

d)

A molecule held together by metallic bonding

20.

Name the ternary ionic compound with formula NaNO3.

a)

Sodium nitrate

b)

Sodium nitrite

c)

Sodium nitride

d)

Sodium nitric acid

21.

Name the ternary ionic compound with formula NH4Cl.

a)

Ammonium chloride

b)

Ammonium chlorate

c)

Ammonium chlorite

d)

Ammonium hypochlorite

22.

Name the ternary ionic compound with formula Fe(OH)3.

a)

Iron(II) hydroxide

b)

Iron(III) hydroxide

c)

Iron trihydroxide neutral complex

d)

Iron oxyhydroxide

23.

Name the ternary ionic compound with formula CuCO3.

a)

Copper(I) carbonate

b)

Copper(II) carbonate

c)

Copper carbonate(III)

d)

Cuprous carbonate(II)

24.

Select the balanced chemical formula for the ternary ionic compound: Copper(II) Phosphate.

a)

CuPO4

b)

Cu2PO4

c)

Cu3(PO4)2

d)

Cu(PO4)2

25.

Select the balanced chemical formula for the ternary ionic compound: Ammonium Sulfide.

a)

NH4S

b)

(NH4)2S

c)

(NH4)3S

d)

NH4S2

26.

Name the following oxyanions by matching each formula to its correct name.

a)

ClO4−\text{ClO}_4^-

1.

Perchlorate

b)

ClO3−\text{ClO}_3^-

2.

Chlorate

c)

ClO2−\text{ClO}_2^-

3.

Chlorite

d)

ClO−\text{ClO}^-

4.

Hypochlorite

27.

Name the following covalent compounds by matching each formula to its correct name.

a)

Cl2O7\text{Cl}_2\text{O}_7

1.

Dichlorine heptoxide

b)

CCl4\text{CCl}_4

2.

Carbon tetrachloride

c)

S2F10\text{S}_2\text{F}_{10}

3.

Disulfur decafluoride

d)

P3N5\text{P}_3\text{N}_5

4.

Triphosphorus pentanitride

28.

Write the balanced chemical formula for each covalent compound by matching each name to its correct formula.

a)

Pentaphosphorous tetrasulfide

1.

P5S4\text{P}_5\text{S}_4

b)

Carbon monoxide

2.

CO\text{CO}

c)

Dihydrogen monoxide

3.

H2O\text{H}_2\text{O}

d)

Tetrasulfur decachloride

4.

S4Cl10\text{S}_4\text{Cl}_{10}

29.

Name the following acids by matching each formula to its correct acid name.

a)

H2CO3\text{H}_2\text{CO}_3

1.

Carbonic acid

b)

HF\text{HF}

2.

Hydrofluoric acid

c)

H3P\text{H}_3\text{P}

3.

Phosphine acid (hypophosphorous acid)

d)

H2SO4\text{H}_2\text{SO}_4

4.

Sulfuric acid

30.

Write the balanced chemical formula for each acid by matching each name to its correct formula.

a)

Phosphoric Acid

1.

H3PO4\text{H}_3\text{PO}_4

b)

Chlorous Acid

2.

HClO2\text{HClO}_2

c)

Hydrosulfuric Acid

3.

H2S\text{H}_2\text{S}

d)

Hydrolodic Acid

4.

HI\text{HI}

31.

When an ionic compound forms, what is the shape of the structure?

a)

A crystal lattice of alternating ions

b)

An amorphous network without long‑range order

c)

A linear chain of discrete molecules

d)

A ring‑shaped molecular cluster

32.

Finish each sentence about ionic bonds by matching it to the correct completion.

a)

Ionic bonds are very ________ and require a lot of ________ to break.

1.

strong; energy

b)

Ionic bonds have high ________ and ________ points.

2.

melting; boiling

c)

Ionic bonds are ______ and ______ solids that break easily when a ______ is applied.

3.

hard; brittle; force

33.

Select all statements that are true.

a)

Ionic solids are poor conductors.

b)

Ionic liquids are poor conductors.

c)

Metals are good conductors.

d)

Metals are not malleable.

34.

What is an electrolyte?

a)

A substance that produces ions in solution and allows electricity to flow

b)

A covalent compound that never dissociates in water

c)

Any metal that conducts when solid

d)

A nonpolar solvent that blocks ion movement

35.

What is a metallic bond?

a)

Attraction between positive metal ions and a delocalized sea of electrons

b)

Sharing of electron pairs between two specific atoms

c)

Electrostatic attraction between oppositely charged ions

d)

Weak intermolecular attraction between neutral molecules

36.

What is a metal alloy?

a)

A mixture of metals (or a metal with a small amount of nonmetal) forming a single metallic material

b)

A pure elemental metal with no other atoms present

c)

A compound formed by ionic bonding between a metal and a nonmetal

d)

A molecular substance composed only of covalent bonds

37.

Match the following

a)

An atom who has lost or gained an electron.

1.

Ion

b)

A bond formed between a cation (positive ion) and anion (negative ion).

2.

Ionic Bond

c)

A bond formed when atoms share one or more pairs of electrons.

3.
Covalent Bond
38.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity

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