Free Printable L2.1 Check: Atomic Structure

1.

What does the atomic number of an element represent?

a)

The number of neutrons in the nucleus

b)

The number of electrons in the outermost shell

c)

The number of protons in the nucleus

d)

The total number of protons and neutrons in the nucleus

2.

What does the mass number of an element represent?

a)

The number of protons in an atom

b)

The number of electrons in an atom

c)

The total number of protons and neutrons in an atom

d)

The total number of protons and electrons in an atom

3.

What are isotopes?

a)

Isotopes are elements with the same number of protons but different number of neutrons

b)

Isotopes are elements with the same number of neutrons but different number of protons

c)

Isotopes are elements with the same number of electrons but different number of protons

d)

Isotopes are elements with the same number of protons but different number of electrons

4.

How are isotopes different from each other?

a)

Isotopes differ in the number of protons they have

b)

Isotopes differ in the number of electrons they have

c)

Isotopes differ in the number of neutrons they have

d)

Isotopes differ in the number of quarks they have

5.

How are isotopes similar to each other?

a)

They have the same number of protons

b)

They have the same number of electrons

c)

They have the same atomic weight

d)

They have the same number of neutrons

6.

What does the atomic mass represent?

a)

The weighted average of all of an element’s isotopes

b)

The total number of protons and neutrons in an atom

c)

The sum of the masses of all the electrons in an atom

d)

The total number of protons, neutrons, and electrons in an atom

7.

Element symbol: O

Atomic number: (a)

Mass number: 16

Number of protons: (b)

Number of neutrons: (c)

Number of electrons: (d)

Choose from the below words

8

16

4

24

8.

Element symbol: (a)

Atomic number: 13

Mass number: (b)

Number of protons: (c)

Number of neutrons: 14

Number of electrons: (d)

Choose from the below words

13

Al

C

N

As

27

26

14

28

47

9.

Which of these can never change in an atom during an ordinary physical or chemical change?

a)

protons

b)

neutrons

c)

electrons

10.

Element symbol: (a)

Atomic number: (b)

Mass number: 31

Number of protons: 15

Number of neutrons: (c)

Number of electrons: (d)

Choose from the below words

P

O

Ph

S

15

16

30

31

10

45

11.

Element symbol: (a)

Atomic number: (b)

Mass number: (c)

Number of protons: (d)

Number of neutrons: 20

Number of electrons: (e)

Choose from the below words

K

P

Po

Kr

19

39

20

40

88

12.

Element symbol: Br

Atomic number: (a)

Mass number: 80

Number of protons: (b)

Number of neutrons: (c)

Number of electrons: (d)

Choose from the below words

35

80

45

40

70

90

13.

Element symbol: (a)

Atomic number: 30

Mass number: 65

Number of protons: (b)

Number of neutrons: (c)

Number of electrons: (d)

Choose from the below words

Zn

P

Tb

Zr

65

30

35

60

70

15

14.

Element symbol: (a)

Atomic number: (b)

Mass number: (c)

Number of protons: 82

Number of neutrons: 125

Number of electrons: (d)

Choose from the below words

Pb

Ld

P

Lr

82

125

53

164

207

43

15.

Element symbol: (a)

Atomic number: (b)

Mass number: 128

Number of protons: (c)

Number of neutrons: (d)

Number of electrons: 52

Choose from the below words

Te

Tl

Cr

C

52

128

180

72

64

76

16.

Element symbol: (a)

Atomic number: 44

Mass number: (b)

Number of protons: (c)

Number of neutrons: 58

Number of electrons: (d)

Choose from the below words

Ru

Rh

Ce

Ch

88

101

102

116

14

44

L2.1 Check: Atomic Structure

Total questions: 16

Worksheet time: 17mins

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