WorksheetsUnit 3 Lesson 1 The Atom - Review
Total questions: 15
Worksheet time: 30mins
Name
Class
Date
1.
All matter is made of ______.
a)
energy
b)
atoms
c)
electrons
d)
compounds
2.
Particles in an atom that are neutral and have no charge are _____.
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
3.
The positive particles of an atom are called _____.
a)
electrons
b)
positrons
c)
neutrons
d)
protons
4.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
5.
A particle that moves around the nucleus of an atom is an _______.
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
6.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
7.
How many Protons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
8.
An atom has 5 protons and 7 neutrons. What is the mass number of the atom?
a)
5
b)
7
c)
2
d)
12
9.
Which colored particle is the electron?
a)
blue
b)
red
c)
yellow
d)
red and yellow
10.
The atomic number is always the number of ...
a)
neutrons.
b)
electrons.
c)
ions.
d)
protons.
11.
What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
12.
What is the atomic number?
a)
number of protons
b)
number of neutrons
13.
What is the mass number?
a)
the number of protons
b)
the sum of the number of protons and the number of neutrons in the nucleus of an atom
c)
the number of electrons
d)
the number of neutrons
14.
Which statement best describes an electron?
a)
Smaller mass than a proton and a negative charge
b)
Smaller mass than a proton and a positive charge
c)
Greater mass than a proton and a negative charge
d)
Greater mass than a proton and a positive charge
15.
Most of an atom's mass is made up of:
a)
electrons and protons
b)
protons and neutrons
100 %
