Unit 3 Review Jackson

Front

What type of chemical bond is formed between two nonmetals?

Back

Covalent bond: A type of bond where two nonmetals share electrons.

Front

Name a pure substance.

Back

Water (H2O): A pure substance made of hydrogen and oxygen.

Front

Back

12: The subscript '12' indicates there are 12 carbon atoms.

Front

Is saltwater a homogeneous or heterogeneous mixture?

Back

Homogeneous: Saltwater has a uniform composition throughout.

Front

What is a chemical change?

Back

A process where substances transform into different substances, like food digestion.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Define a covalent bond.

Back

A covalent bond is formed when two nonmetals share one or more pairs of electrons.

Front

What is an ionic bond?

Back

An ionic bond is formed when one atom transfers electrons to another, resulting in oppositely charged ions.

Front

What is a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

What is the difference between a homogeneous and heterogeneous mixture?

Back

Homogeneous mixtures have a uniform composition, while heterogeneous mixtures do not.