Atoms Quick Check

Front

An element's atomic number is the same as the number of ____________.

Back

protons

Front

This subatomic particle has a positive charge.

Back

proton

Front

Pure substances made up of only one type of atom are called ____________.

Back

Elements

Front

The positively charged particles of an atom are the ____________.

Back

protons

Front

An atom is the smallest unit of matter. True or False?

Back

True

Front

The center of an atom is called the ____________.

Back

nucleus

Front

The negatively charged particles in an atom are called ____________.

Back

electrons

Front

The number of protons in an atom determines its ____________.

Back

element identity

Front

Atoms are made up of three main subatomic particles: protons, neutrons, and ____________.

Back

electrons

Front

The mass of a proton is approximately ____________ times greater than that of an electron.

Back

1836