+/66 TOTAL
Name: _______________________________
States of Matter Unit Test
DIRECTIONS: Answer the questions below to the best of your ability! Make sure that you have 5
pages and that the last question is question 18. I believe in you, you got this, good luck!! TRY
EVERYTHING, LEAVE NOTHING BLANK.
As a reminder to what we have been working towards, our unit goal is: SWBAT XX
SECTION I: MULTIPLE CHOICE Circle the BEST answer to the question given. [2
points each – 16 points total]
1. Barium has __ valence electrons.
a. 2
b. 4
c. 6
d. 8
2. The outermost shell of a Bohr model
is called the ______________.
a. Valence Electron
b. Valence Shell
c. Chemical Change Shell
d. 3rd Energy Level.
3. Which element follows the duet rule?
a. Helium
b. Hydrogen
c. Boron
d. Carbon
4. The octet rule states __________.
a. An element needs 2 valence
electrons to be happy.
b. An element needs 8 valence
electrons to be happy.
c. You have to fill every orbital
before you start pairing
electrons.
d. None of the above.
5. The atomic number tells us ______.
a. The number of electrons
b. The number of protons
c. The number of neutrons
d. Both a and b
e. Both b and c
6. A chemical change is ___________.
a. When a chemical combines
with another substance to
form a new substance.
b. When a substance changes but
still retains its chemical
properties.
c. When it shares valence
electrons with another
element.
d. Both a and b.
e. Both a and c.
7. Water evaporating is an example of a
____________.
a. Physical Change
b. Chemical Change
c. Melting
d. None of the above.
8. The location where electrons go are
called _________?
a. Orbitals
b. Valence shells
c. Electron spaces
d. Mr. Lopez’s classroom.
Page 1 of 5
SECTION II: MATCHING Classify the scenario as a chemical or physical change
and EXPLAIN your thinking in 2 sentences. [3 points each - 12 points total]
9. Mr. Lopez always has too much paper on his desk so he decides to shred some of the
paper.
TYPE OF CHANGE: _________________.
EXPLANATION:
10. It’s the 4th of July and we can all see fireworks lighting up the night sky!
TYPE OF CHANGE: ________________.
EXPLANATION:
11. Miss Angela is making breakfast in the morning and accidentally leaves some eggs out. She
finds them two months later and finds that they have rotted.
TYPE OF CHANGE: ________________.
EXPLANATION:
12. Jacob, Mr. Lopez’s baby brother, likes to play with clay. Jacob rips the clay in to halves.
TYPE OF CHANGE: _______________.
EXPLANATION:
Page 2 of 5
SECTION III: BOHR MODELS Answer the following questions about drawing Bohr
models. [20 points total]
12. What is the pairing rule when drawing Bohr Models? [2 points]
13. The element is Oxygen [6 points]
13a. What is the total number of
13b. Draw the Bohr Model of this element here.
LABEL THE VALENCE SHELL.
ELECTRONS: ______
PROTONS: _______.
NEUTRONS: _______.
14. The element is Aluminum. [6 points]
14b. Draw the Bohr Model of this element here.
LABEL THE VALENCE SHELL.
14a. What is the total number of
ELECTRONS: ______
PROTONS: _______.
NEUTRONS: _______.
15. The element is Hydrogen [6 points]
15a. What is the total number of
15b. Draw the Bohr Model of this element here.
LABEL THE VALENCE SHELL.
ELECTRONS: ______
PROTONS: _______.
NEUTRONS: _______.
Page 3 of 5
SECTION IV: DRAWING COMPOUNDS Follow the directions given per question
about drawing the compounds. [18 points total – 6 points each].
16. The compound is Br2.
16a. Draw the Lewis dot structure of ALL the elements in the compound. [2 points]
16b. List the total number of VALENCE ELECTRONS in the compound. [2 points]
16c. Draw the compound. MAKE SURE IT LOOKS NEAT! HINT: A BOND IS TWO
ELECTRONS. [2 points]
17. The compound is SH2.
17a. Draw the Lewis dot structure of ALL the elements in the compound. [2 points]
17b. List the total number of VALENCE ELECTRONS in the compound. [2 points]
17c. Draw the compound. MAKE SURE IT LOOKS NEAT! HINT: A BOND IS TWO
ELECTRONS. [2 points]
Page 4 of 5
18. The compound is HCN.
18a. Draw the Lewis dot structure of ALL the elements in the compound. [2 points]
18b. List the total number of VALENCE ELECTRONS in the compound. [2 points]
18c. Draw the compound. MAKE SURE IT LOOKS NEAT! HINT: A BOND IS TWO
ELECTRONS. [2 points]
Page 5 of 5