Worksheets4th Quarter Review
Total questions: 26
Worksheet time: 20mins
An electron is
positively charged
neutral
negatively charged
atomic number is
the number of protons
the number of electrons
the number of neutrons
the location of an atom on the periodic table
How many Al atoms are present? 4Al2O3
2
8
6
4
How many F atoms are present?
6MgF2
2
6
8
12
A substance that is formed as the result of a chemical reaction is a __________________
Product
Reactant
Starters
Enders
Which of the following is an example of a chemical change?
water freezes to form ice
sugar dissolves in water
gasoline burns in a car engine
a piece of metal expands when it is heated
2HI --> H2 + I2
What type of reaction is illustrated below?
Zn + H2S --> ZnS + H2
synthesis
decomposition
single replacement
double replacement
Who's she?
Violet
Merida
Ana
Helen
Why must chemical equations be balanced?
So that the equation doesn't explode
The reaction won't happen until it is balanced
Based on the Law of Conservation of Matter, matter cannot be created or destroyed.
Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO
Mg and O2
MgO
Mg and MgO
O2 and MgO
Why do elements bond?
To be friends
To create a new element
To become stable
To get bigger
What is this note?
A
G
D
E
What is the name of the portable gaming system pictured?
Xbox Kinect
Nintendo Gameboy
Nintendo Switch
Playstation Vita
How many valence electrons does Oxygen (O) have?
6
8
15
16
