Free Printable Atomic Structure

1.

A column in the periodic table is known as a

a)

Row

b)

Period

c)

Group

2.

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

a)

cell

b)

nucleus

c)

atom

d)

electron

3.

What is a subatomic particle with a positive charge that is in the nucleus of an atom?

a)

neutron

b)

proton

c)

electron

d)

valence electron

4.

What is a subatomic particle without an electric charge, located in the nucleus of an atom?

a)

neutron

b)

proton

c)

electron

d)

valence electron

5.

What is the center of an atom containing protons and neutrons?

a)

nucleus

b)

neutron

c)

proton

d)

electron cloud

6.

What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?

a)

mass number

b)

atomic mass

c)

atomic number

d)

atomic symbol

7.

Subatomic particle with a charge of 0

a)

neutron

b)

proton

c)

electron

d)

quark

8.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

9.

The number 16 for the atomic element sulfur is the

a)

ionic number

b)

isotope

c)

atomic mass

d)

atomic number

10.

How many protons are in this element?

a)

79

b)

196

c)

117

d)

Cannot be determined

11.

How many electrons does potassium K contain? (click to see image)

a)

19

b)

39

c)

20

d)

40

12.

How many neutrons does a Hydrogen atom have?

a)

1

b)

2

c)

3

d)

0

13.

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

a)

cell

b)

nucleus

c)

atom

d)

electron

14.

How many protons does an aluminum atom have?

a)

27

b)

14

c)

40

d)

13

15.

Complete the missing label on the diagram.

a)

Neutron

b)

Centre

c)

Nucleus

d)

Sub atomic particle

16.

The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

a)

mass number

b)

atomic number

c)

atomic weuight

d)

isotope weight

17.

What element has 9 protons, 9 electrons, and 10 neutrons?

a)

nitrogen

b)

oxygen

c)

fluorine

d)

neon

18.

What is the correct number of subatomic particles of a phosphorous atom with a mass of 31?

a)

p =15, n = 15, e =15

b)

p = 15, n = 16, e = 15

c)

p = 15, n = 15, e = 16

d)

p = 16, n = 15, e = 15

19.

How many total electrons does O^-2 (an oxide ion) have?

a)

8

b)

10

c)

6

d)

18

20.

How many total electrons does Na⁺¹ (a sodium ion) have?

a)

10

b)

11

c)

12

d)

22

Atomic Structure

Total questions: 20

Worksheet time: 10mins

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