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Chemistry Review
Test Description: Chemistry 1st semester review
Instructions: Answer all questions to get your test result.
1) How many valence electrons does Silicon have?
A
14
B
3
C
4
D
15
2) Which of the following is an intensive property?
A
length
B
mass
C
volume
D
melting point
3) What type of mixture is saltwater?
A
heterogeneous mixture
B
compound
C
pure substance
D
homogeneous mixture
4) Why type of reaction takes one reactant and breaks it down into 2
A
combustion
B
decomposition
C
Synthesis
D
Single replacement
5) What is the molar mass of CH4?
A
16
B
12
C
14 g/mol
D
16 g/mol
6) How many oxygen atoms are in 3CO2?
A
8
B
2
C
6
D
4
7) Rank Boron, Fluorine, Aluminum and Gallium in order of least to greatest Atomic Radius
A
Aluminum, Gallium, Fluorine, Boron
B
Gallium, Aluminum, Fluorine, Boron
C
Fluorine, Boron, Aluminum, Gallium
D
Boron, Fluorine, Aluminum, Gallium
8) Group 13 has _____ valence electrons. It is more likely to __________ its valence electrons
A
13, give away
B
3, steal
C
3, give away
D
13, steal
9) Which is a way a piece of paper can go through a chemical change?
A
soak it in water
B
burn it
C
Fold the paper in half
D
cut it with scissors
10) Which of the following is a physical change?
A
cooking an egg
B
dissolving salt and water
C
nail rusting
D
bubbles when something is mixed with acid
*select an answer for all questions
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