Atomic Structure

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• Neutrons

• Electrons

• Protons

• Isotopes

Sum of the nuclear particles: protons + neutrons

• Subatomic particles

• Atomic number

• Atomic mass

• Atomic property

An atomic property representing the number of protons in an atom.

• Atomic mass

• Mass number

• Valence electrons

• Atomic number

Subatomic particles that are neutral in charge.

• Neutrons

• Protons

• Nucleus

• Electrons

Atoms of the same element with a different number of neutrons.

• Ions

• Nucleons

• Isotopes

• Quarks

An electrically charged atom.

• Ion

• Isotope

• Electron

• Proton

Where electrons are likely to be found as they travel around the nucleus.

• Nucleus

• Shells

• Within a proton

• Within a neutron

A tiny but very dense, positively charged part of the atom that holds most of the atomic mass.

• Electron shells

• Orbitals

• Energy levels

• Nucleus

What determines the identity of an atom?

• Number of neutrons

• Number of electrons

• Number of atoms

• Number of protons