Chemistry

Atomic mass

The total mass of particles of matter in an atom.

Atomic number

The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table

Nucleus

consist of electrically positive protons and electrically neutral neutrons.

Isopote

members of a family of an element that all have the same number of protons and electrons but different numbers of neutrons

The atomic number is determined by the number of...

Protons

Proton and neutron

The atomic mass is determined by adding the number of...

Electron

The particle that does not contribute to mass but determines the charge is the...

You determine an atom to be a negative ion. This means...

there are more electrons than protons.