Review for Test on Unit 2 - Basics of Matter

Front

What is the basic unit of matter?

Back

The atom is the basic unit of matter.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

How many atoms are in a CO2 molecule?

Back

1 carbon atom.

Front

What are physical properties?

Back

Physical properties are characteristics that can be observed without changing the substance, such as color, boiling point, and solubility.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a physical change?

Back

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

Front

What is a chemical change?

Back

A chemical change results in the formation of new substances with different properties.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent.