Ch. 2 The Chemistry of Life

Front

What are the 3 subatomic particles that make up an atom?

Back

Protons, neutrons, and electrons.

Front

What is an atom?

Back

Basic unit of matter.

Front

What charge do protons carry?

Back

Positively charged (+).

Front

What charge do neutrons carry?

Back

Carry no charge (neutral).

Front

Where are electrons located?

Back

In energy levels outside of the nucleus.

Front

What is an element?

Back

A pure substance that consists entirely of one type of atom.

Front

What is the atomic number?

Back

Number of protons in the nucleus AND electrons.

Front

What are isotopes?

Back

Atoms of the same element that differ in the number of neutrons.

Front

What is the mass number?

Back

Total number of protons AND neutrons in the nucleus.

Front

What is a chemical compound?

Back

A substance formed by the chemical combination of 2 or more different elements in definite proportions.