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atom

Total questions: 25

Worksheet time: 15mins

Name
Class
Date
1.

the atom consist of .......................

a)

electron

b)

nucleus

c)

molecules

d)

light

2.
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
3.
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
4.
What electrical charge does a proton have?
a)
+1
b)
0
c)
-1
d)
+2
5.
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
6.

How many protons does an aluminum atom have?

a)

27

b)

14

c)

40

d)

13

7.

How many electrons does a sodium atom have?

a)

23

b)

11

c)

12

d)

34

8.

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

9.

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

10.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
11.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
12.
An atoms overall charge is 
a)
positive 
b)
depends on its mood 
c)
neutral 
d)
negative 
13.

What is this elements Atomic Number?

a)

2

b)

4

c)

6

14.

electrons have a _________ charge

a)

positive

b)

negative

c)

neutral

15.
The energy of an electron __________ as it moves further away from the nucleus
a)
increases
b)
decreases
16.
Compared to the charge and mass of a proton, an electron has...
a)
the same charge and a smaller mass
b)
the same charge and same mass
c)
an opposite charge and a smaller mass
d)
an opposite charge and the same mass
17.

Which particles are responsible for the mass of an element?

a)

protons, neutrons

b)

protons, electrons

c)

electrons

d)

neutrons

18.

In the picture, what does the letter "A" represent in the atom?

a)

energy level

b)

nucleus

c)

protons

d)

neutrons

19.

In the picture, what does the letter "B" represent in the atom?

a)

energy level

b)

nucleus

c)

protons

d)

neutrons

20.

The symbol of the third energy level is ...................

a)

Q

b)

M

c)

N

d)

L

21.

The motion of electrons around the nucleus are similar to ....................................

a)

motion of the train

b)

motion of the donkey in the farm

c)

the motion of arms of the fan

22.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
23.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
24.
All ____________ are made up of two or more atoms bonded together.
a)
atoms
b)
molecules
c)
electrons
d)
elements
25.
The smallest unbreakable unit of a compound is called
a)
subscript
b)
proton
c)
formula
d)
molecule

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