Unit 2 - The Atom (msp)

Front

Atom

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

Proton

Back

A subatomic particle found in the nucleus of an atom, with a positive electric charge.

Front

Electron

Back

A subatomic particle with a negative electric charge, found in the electron cloud surrounding the nucleus.

Front

Neutron

Back

A subatomic particle found in the nucleus of an atom, with no electric charge.

Front

Valence Electrons

Back

Electrons in the outer shell of an atom that are involved in forming bonds.

Front

Quarks

Back

Elementary particles and a fundamental constituent of matter, which combine to form protons and neutrons.

Front

Atomic Number

Back

The number of protons in the nucleus of an atom, determining the element's identity.

Front

Mass Number

Back

The total number of protons and neutrons in an atom's nucleus.

Front

Groups

Back

Vertical columns in the periodic table, which contain elements with similar chemical properties.

Front

Periods

Back

Horizontal rows in the periodic table, where elements have the same number of electron shells.