HPS- Benchmark #2 Study Guide Part 2

What is the primary reason elements form compounds?

• To increase their atomic mass

• To achieve stability

• To change their physical properties

• To decrease their atomic number

In an ionic bond, what happens to the electrons?

• They are shared equally between atoms

• They are destroyed

• They are transferred from metal to nonmetal

• They remain unchanged

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Which type of elements typically form cations?

• Noble gases

• Nonmetals

• Metalloids

• Metals

How many electrons are shared in a triple covalent bond?

• Two electrons

• Four electrons

• Eight electrons

• Six electrons

What is the charge of the sulfate polyatomic ion?

• -1

• 2

• -2

• +1

In a single replacement reaction, what occurs?

• Two compounds exchange ions

• One element replaces another in a compound

• Three elements combine

• A compound breaks down

Which is NOT a sign of a chemical reaction?

• Release of light

• Change in mass

• Formation of a precipitate

• Temperature change

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How does increasing temperature affect reaction rate?

• Has no effect

• Decreases the rate

• Increases the rate

• Only affects solid reactants

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What is the prefix for 8 atoms in a covalent compound name?

• Octa-

• Hepta-

• Nona-

• Deca-

In a combustion reaction, what is always a reactant?

• Water

• Carbon dioxide

• Oxygen

• Nitrogen