8.P.1 (Chemistry) Review

Front

What category of elements is found between the metals and nonmetals on the periodic table?

Back

Metalloids are elements that have properties of both metals and nonmetals, and they are found between these two categories on the periodic table.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that in a closed system, the total mass of the reactants must equal the total mass of the products.

Front

If a researcher combines 37 grams of iron with 16 grams of oxygen, what will be the resulting mass of the product?

Back

53 grams, because the total mass of the reactants (37g + 16g) equals the mass of the products.

Front

When wood is burned, what happens to the mass of the wood?

Back

The mass of the wood decreases because some of the mass is lost as gas (smoke) during combustion.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

Back

A balanced chemical equation shows that the total amount of matter remains the same before and after a chemical reaction.

Front

What are metalloids?

Back

Metalloids are elements that have properties intermediate between metals and nonmetals, such as silicon and germanium.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid without altering its chemical structure.

Front

What is an example of a chemical change?

Back

Rusting of iron is an example of a chemical change, as it forms a new substance (iron oxide) through a chemical reaction.