Free Printable GCSE Atomic theory 1

1.

What does atomic number mean?

a)

How many neuclei an atom has

b)

How many neutrons an atom has

c)

how many protons an atom has

2.

How do you calculate how many neutrons an atom has?

a)

Atomic number - atomic mass number

b)

Atomic mass number - atomic number

c)

Atomic number + atomic mass number

d)

Atomic mass number + atomic number

3.

How do you calculate how many electrons an atom has?

a)

Same as mass number

b)

atomic mass number - atomic number

c)

Same as number of protons

d)

Atomic mass number + atomic number

4.

Which of the following are found in the nucleus:

a)

Protons

b)

Electrons

c)

Neutrons

d)

Orbitals

5.

How many protons does Na have?

_{ }^{23}Na

a)

23

b)

12

c)

11

d)

44

6.

How many neutrons does
$_{ }^{23}Na$ have?

a)

23

b)

11

c)

12

d)

44

7.

How many electrons does
$_{ }^{23}Na$ have?

a)

23

b)

11

c)

12

d)

44

8.

How many electrons does $_{ }^{24}Na$ have?

a)

23

b)

11

c)

13

d)

44

9.

How many protons does $_{ }^{24}Na$ have?

a)

23

b)

11

c)

13

d)

44

10.

How many neutrons does $_{ }^{24}Na$ have?

a)

23

b)

11

c)

13

d)

44

11.

What term describes atoms of the same element with different numbers of neutrons?

(a)

12.

What is the electronic configuration of calcium?

a)

2.8.8.2.

b)

2.8.8.18.4.

c)

2.2.8.8.

d)

2.4.8.8.18.

13.

Which element has the electronic configuration 2.8.7.?

a)

I

b)

F

c)

Li

d)

Cl

14.

Which element(s) are in group 7?

a)

I

b)

F

c)

Li

d)

Cl

e)

Ne

15.

Who discovered the electron?

a)

Thomson

b)

Rutherford

c)

Dalton

d)

Chadwick

16.

Who discovered the proton?

a)

Thomson

b)

Rutherford

c)

Dalton

d)

Chadwick

17.

Who discovered the neutron?

a)

Thomson

b)

Rutherford

c)

Dalton

d)

Chadwick

18.

Who discovered the nucleus?

a)

Thomson

b)

Rutherford

c)

Dalton

d)

Chadwick

19.

How many neutrons does
$_{ }^{41}Ca$ have?

a)

20

b)

21

c)

41

d)

19

20.

What is the mass of
$_{ }^{41}Ca$ ?

a)

20

b)

21

c)

41

d)

19

GCSE Atomic theory 1

Total questions: 20

Worksheet time: 10mins

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