Atom and the Periodic Table Vocabulary

The smallest form of matter that still retains the properties of an element

• Quark

• Atom

• Nucleus

• Electron cloud

Negatively charge particles in an atom

• Proton

• Electron

• Neutron

Positively charged particles in an atom

• Protons

• Electrons

• Neutrons

Particles that differ in number between isotopes

• Protons

• Neutrons

• Electrons

Region surrounding the nucleus where electrons are found

• Electron Cloud

• Quark

• Period

• Isotopes

Center of the atom containing protons and neutrons

• Electron Cloud

• Isotopes

• Nucleus

• Group

The smallest known particle that makes up protons and neutrons

• Electrons

• Nucleus

• Valence electrons

• Quark

Represents the identify of an element

• Atomic Number

• Mass number

• Isotopes

The sum of protons and neutrons in an atom

• Atomic Number

• Mass number

• Period

The mass on the periodic table

• Nucleus

• Average atomic mass

• Mass number

• Atomic number