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Atomic Structure

Total questions: 20

Worksheet time: 14mins

Name
Class
Date
1.
What is atomic number?
a)
Number of protons in an atoms 
b)
Number of neutrons in an atom
c)
Mass of an atom
d)
Charge on an atom
2.
Which subatomic particles are found in the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons, Neutrons and Electrons
3.
What electrical charge does a proton have?
a)
+1
b)
0
c)
-1
d)
+2
4.
The total number of protons and neutrons in an atom is called the...
a)
Atomic number
b)
Proton number
c)
Mass number
d)
Weight number
5.

How many protons does an aluminum atom have?

a)

27

b)

14

c)

40

d)

13

6.

How many electrons does a sodium atom have?

a)

23

b)

11

c)

12

d)

34

7.
Complete the missing label on the diagram.
a)
Neutron
b)
Centre
c)
Nucleus
d)
Sub atomic particle
8.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
9.
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
10.

The mass number of an element that has 18 protons, 18 electrons, and 19 neutrons is _____.

a)

12.5

b)

13

c)

25

d)

37

11.

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

a)

nitrogen

b)

oxygen

c)

fluorine

d)

neon

12.
Which particle is negatively charged?
a)
proton
b)
atom
c)
neutron
d)
electron
13.

What is the mass number of a nickel atom with 28 protons, 31 neutrons, and 28 electrons?

a)

31

b)

28

c)

59

d)

87

14.

How many neutrons does a silver atom with a mass of 108 amu have?

a)

47

b)

108

c)

61

d)

108

15.

What is the atomic number of a chlorine atom with a mass of 35 amu?

a)

17

b)

35

c)

18

d)

52

16.

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

17.
The arrangement of elements in order of increasing atomic number
a)
Periodic Table
b)
Atomic Number List
c)
Bohr Model
18.
What element does the Bohr Model represent?
a)
Nitrogen
b)
Potassium
c)
Sodium
19.
If an element has 14 protons, 15 neutrons, and 14 electrons, what is that elements atomic mass
a)
28
b)
14
c)
29
20.

The number 16 for the atomic element sulfur is the

a)

ionic number

b)

isotope

c)

atomic mass

d)

atomic number

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