Chemistry Unit Review:
Take out your notebook so you can answer
these review questions.
Test = Friday!
We will make review slides Wednesday and
Thursday.
You will not take the test until your review
slides are completed.
1. What are the four states of
matter?
The four states of matter are solid,
liquid, gas, and plasma.
2. Which state of matter does not
change shape or volume?
Solids are the only state of matter
which do not change shape or
volume.
3. Which states of matter change
volume ? Do their shapes change as
well?
Gas and plasma are the only states
of matter that change both shape
and volume at the same time.
4. Which states of matter have
particles that are in constant
motion?
All states of matter have particles
that are in constant motion. We don’
t see them move in solids as they
are tiny.
A. A gas turns to liquidcondensation
B. A solid turns to a gassublimation
C. A liquid turns to a gasvaporization
D. A solid turns to a liquid-Melting
E. A liquid turns to a solid-Freezing
6. Name the term that means energy
is absorbed by a material
Endothermic means that energy is
put in or absorbed by a substance
Think of ENdothermic, energy
ENters...
7. Name the term that means energy
is released by a material
Exothermic means that energy is
released or given off by a substance.
Think of EXothermic, energy EXits.
7a: Are these processes
endothermic or exothermic?
●
●
●
●
●
Condensation
Sublimation
Vaporization
Melting
Freezing
8. Sanding wood. Is it a physical or
chemical change? How do you
know?
It is a physical change because the
sawdust is still wood and has the
same properties as the wood that
was sanded.
9. Lighting fireworks. Is it a
physical or chemical change? How
do you know?
Chemical change - It cannot be
undone and it changes properties
10. Melting iron. Is it a physical or
chemical change? How do you
know?
Physical change. The substance is
still iron no matter if it is a solid or a
liquid. When the molten iron cools
down, it turns back to a solid.
11. What is an element?
A pure substance that is naturally
occurring and is made of just one
type of atom.
12. List and describe the three types
of elements.
Metals - conduct electricity; ductile; shiny
Non-metals-poor conductors; brittle; dull
Metalloids - have properties of both;
otherwise known as semiconductors
13. Describe the three parts of the
atomic theory.
1. Everything is made up of atoms.
2. Atoms cannot be created or destroyed.
3. Atoms of the same type are the same,
atoms of different types are different
14. Make a diagram of a Vanadium
Neutral Atom
P: 23
E: 23 (2, 8, 8, 5)
N: 28
15. Describe how the periodic table
is arranged. Use at least 3
sentences!
Periodic - in a repeating pattern
Metals are on the left.
Non-metals are on the right.
The metalloids are located next to
the zig-zag line.
15. Continued….
● Dmitri Mendeleev arranged elements in an
increasing atomic mass.
● Henry Mosley rearranged elements in an
increasing atomic number (protons)
● Rows are called periods.
● Columns are called groups (or families)
● Elements in the same group have similar
properties.
15. Continued…..
● Groups 1 & 2 - very reactive metals
● Group 17 - very reactive gas
● Group 18 - noble gases - particularly
nonreactive
● The further down an element is in a group,
the more reactive it is.
Your assignment for Friday:
Make thirty (30), yes 30, slides/flashcards to help
you review for the Chemistry unit exam.
You may use terms that you saw in this review.
Use your book and worksheets to make the job easier.
You will not take the test until they are complete!