Atomic Structure

Front

Smallest unit of matter that retains the properties of an element

Back

Atom

Front

Subatomic particle with a positive charge located in the nucleus of an atom

Back

Proton

Front

Central region of the atom containing most of its mass

Back

Nucleus

Front

Atoms of the same element with a different number of neutrons

Back

Isotopes

Front

Atomic number of an element represents the number of

Back

Protons in the nucleus of an atom

Front

In a neutral atom, the number of electrons is equal to the number of

Back

Protons

Front

Mass number of a single atom is calculated by adding the number of

Back

Protons and neutrons

Front

An element with an atomic number of 8 and a mass number of 16 has

Back

8 neutrons

Front

Smallest particle with a negative charge

Back

Electron

Front

Electrons in the outermost energy level of a Bohr model

Back

Valence electrons