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Worksheets

Electrons and Chemical Bonds

Total questions: 27

Worksheet time: 7hrs 45mins

Name
Class
Date
1.

Which Bohr Model contains 2 valence electrons?

a)
b)
c)
2.

How many total electrons are in Phosphorus(P)?

a)

5

b)

15

c)

7

d)

10

3.

What group number does Boron belong to?

a)

5

b)

3

c)

8

d)

10

4.

How many valence electrons are in Boron?

a)

5

b)

3

c)

4

d)

13

5.

What is the magic number for chemical bonding?

a)

5

b)

6

c)

7

d)

8

6.

Atoms form chemical bonds using electrons in the _________ energy level.

a)

Inner

b)

Middle

c)

Outer

7.

Does Chlorine(Cl) need to gain or lose electron(s) to become a complete energy level?

a)

Gain

b)

Lose

8.

What is the electronic configuration for the atom Aluminum(Al)?

a)

2, 3, 4

b)

3, 8, 2

c)

2, 8, 3

d)

8, 8, 3

9.

______ ______ is a bond that transfers an electron from one atom to another, forming ions.

a)

Ionic Bond

b)

Covalent Bond

10.

How many electrons does Lithium(Li) need to transfer to Fluorine(F)?

a)

8

b)

1

c)

3

d)

2

11.

Ionic Compounds do not form molecules. True or False?

a)

True

b)

False

12.

How many valence electrons are in the Lewis dot diagram Oxygen(O)?

a)

4

b)

6

c)

5

d)

7

13.

Name an element that matches this Lewis dot structure.

a)

Nitrogen(N)

b)

Hydrogen(H)

c)

Oxygen(O)

d)

Aluminium(Al)

14.

Based on the Periodic Table, is CaF2 likely to be an ionic or covalently bonded compound?

a)

Ionic

b)

Covalent

15.

Ionic bonds are bonds in which electrons are _______ from one atom to another.

a)

Transferred

b)

Shared

16.

When atoms gain or lose an electron, they become _____.

a)

Molecules

b)

Ions

c)

Atoms

d)

Electrons

17.

An ion is a charged atom. True or False?

a)

True

b)

False

18.

Covalent bonds are bonds in which electrons are _______ from one atom to another.

a)

Transferred

b)

Shared

19.

Based on the Periodic Table, is SiO2 likely to be an ionic or covalently bonded compound?

a)

Ionic

b)

Covalent

20.

Elements which are far away from each other on the Periodic Table tend to form what kind of bond?

a)

Ionic

b)

Covalent

21.

Elements which are close together on the Periodic Table tend to form what kind of bond?

a)

Ionic

b)

Covalent

22.

A _____________ is a group of atoms held together by covalent bonds in a specific ratio and shape.

a)

Molecule

b)

Bond

23.

How many valence electrons are in Oxygen(O)?

a)

6

b)

7

c)

8

d)

9

24.

How many total electrons are in Oxygen(O)?

Use your Periodic Table.

Hint: Only the shaded electrons.

a)

6

b)

7

c)

8

d)

9

25.

What type of bond is this an example of (NaCl)?

a)

Ionic

b)

Covalent

26.

What type of bond is this an example of (H2O)?

a)

Ionic

b)

Covalent

27.

______ ______ is a bond that shares electrons with atoms to form molecules.

a)

Ionic

b)

Covalent