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WorksheetsTest Review: Chemistry
Total questions: 20
Worksheet time: 10mins
A pure substance made of only one type of atom is
a compound
a mixture
a solid
an element
A type of mixture that is not evenly spread and is easier to separate:
homogeneous
heterogeneous
solution
compound
The two main classification categories of matter are
elements and compounds
mixtures and pure substances
mixtures and solutions
solids and liquids
Which of the following would be an element?
barium
salt
air
soil
A chemical formula represents the
different parts of a mixture
reactants and products in a reaction
atoms and elements in a compound
the law of conservation of mass
The small number to the bottom right of a symbol is the
coefficent
superscript
exponent
subscript
What creates a new substance by a chemical change?
chemical reaction
physical change
heterogeneous mixture
dissolving solution
Which of the following is NOT evidence of a chemical change or reaction?
gas bubbles
color change
odor
broken pieces
A ________mixture looks the same throughout.
heterogeneous
compound
homogeneous
exothermic
The picture above would be considered
an element
a mixture
a compound
a reaction
Which box represents particles in a compound?
A
B
C
D
Which box above represents particles in an element?
W
X
Y
Z
According to the Law of Conservation of Mass, matter
is always created
is always destroyed
is neither created nor destroyed
never changes form
Coefficients are found at the bottom right of element symbols.
True
False
When a chemical equation is balanced, the
amount of products are more than the reactants
reactants completely disappear
the subscripts switch for certain compounds
amount of products and reactants are equal
An __________reaction gives off heat.
endothermic
exergenic
endochemical
exothermic
Is the equation above balanced or unbalanced?
balanced
unbalanced
How many atoms in total are in the chemical formula above?
10
16
15
11
What type of chemical reaction absorbs heat energy?
endothermic
exothermic
equithermic
equilibrium
In the chemical reaction above, which of the following is a reactant?
CO2
H2O
H2
CH4
