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8th Grade Chemical Bonding And Reactions Quiz.
Test Description: This is a test of your knowledge on Chemical Reactions and Chemical Equations.
Instructions: Answer all questions to get your test result.
1) During a chemical reaction
A
the mass of the products is greater than the mass of the reactants.
B
the mass of the reactants is greater than the mass of the products.
C
the mass of the reactants and the mass of the products are equal to each other.
D
matter CAN be lost during chemical reactions.
2) The Law of Conservation of Matter states that
A
matter can be lost during a chemical reaction.
B
mass changes as chemical reactions occur.
C
chemical reactions can cause a loss of mass.
D
matter can neither be created or destroyed during a chemical reaction.
3) The two different types of chemical bonds are
A
polar and non polar bonds
B
anions and cations bonds
C
ionic and covalent bonds
D
valent and covalent bonds
4) This type of chemical bond occurs when an electron is gained or lost by an atom of an element.
A
covalent
B
ionic
C
valent
D
cation
5) This type of chemical bond occurs when electrons are shared by atoms of at least two different elements on the valence level.
A
valent
B
covalent
C
ionic
D
cation
6) Which family of elements are the most stable?
A
Metalloids
B
Halogens
C
Noble Gases
D
Alkali Metals
7) As you move down a column from top to bottom in the periodic table, one trend that is consistent is that atoms get
A
more reactive
B
less stable
C
larger, more reactive, and less stable
D
larger
8) If an atom has 8 electrons in the valence electron level, that atom is
A
unstable.
B
least likely to bond with other atoms.
C
an isotope of another atom.
D
likely to bond with other atoms.
9) In the following chemical equation, which are the reactants? 2H2 + O2 yields 2H2O
A
There are only products in this equation.
B
The reactants are found before the word yields.
C
Both sides of the word yields are reactants.
D
The reactants are found after the word yields.
10) 6CO2 + 6H2O yields C6H12O6 +6O2 is an example of
A
a chemical equation that demonstrates a chemical reaction.
B
a chemical formula that demonstrates a chemical equation.
C
an unbalanced chemical equation.
D
a molecule of water bonding with carbon dioxide.
*select an answer for all questions
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