Matter Test Review
Do you know your atoms?
Name the 3 parts of an atom
Electrons
Protons
Neutrons
List the charge for each part:
Electrons are:
• Negative
Protons are:
• Positive
Neutrons are:
• No charge
What is inside of the nucleus?
• Protons
• Neutrons
What is outside the nucleus of the
atom?
• Electrons
What is the arrow pointing to?
• Electrons on the outside
What is the charge of the nucleus?
• Positive because
protons are positive
and neutrons have
no charge
The atomic mass is the number of
protons and neutrons in the nucleus
• Protons and neutrons have
the mass of 1 amu.
• Count protons and
neutrons to find the atomic
mass
• The atomic mass of this
atom would be 40 because
20 protons + 20 neutrons = 40
What is the atomic mass?
• It is 39 because there
are 19 protons + 20
neutrons
Do you know your elements?
You can use the periodic table to find
the atomic number of every element
The periodic table is organized by the
atomic number (# of protons)
How many protons does silver have?
• 47
Here is a close up of beryllium from
the periodic table:
• It’s atomic mass
is 9.0122, which
means it has an
average of
9.0122 protons
and neutrons
(we’ll get into
why it is
averaged later)
What is the atomic number?
•17
What is the atomic mass?
•24.305
What is the number of protons?
•7
What is the atomic mass?
•35.453
Which atom is lithium, with an atomic
number of 3?
A
2 protons
3 neutrons
B
3 protons
2 neutrons
What is the atomic number?
•12
What is the number of protons?
•17
Which atom is helium, with an atomic
number of 2?
A
2 protons
3 neutrons
B
3 protons
2 neutrons
What is the number of protons?
•4
The atomic mass is the number of
______ and ________
• Protons and neutrons
Which atom is fluorine, with an atomic
number of 9?
A
9 protons
8 neutrons
B
8 protons
9 neutrons
Do you know your phases of
matter?
What are the 3 states of matter?
SOLID
LIQUID
GAS
When a material is cooled, what
happens to the motion of the
molecules?
Move slower
When energy is added to Liquids
and they become a gas quickly, the
process is called
BOILING
If the gas is trapped and cooled
enough to become a liquid, then
_________ has occurred.
CONDENSATION