Atomic Number and Mass Number Flashcards

Vocabulary flashcards covering the fundamental concepts of atomic number, mass number, and the subatomic composition of Lithium based on Labster theory pages.

Atomic number ($Z$)

The specific indicator of the number of protons in the nucleus of an atom of a chemical element.

Neutral state

The state of an atom where the atomic number equals the number of electrons.

Fixed status of Atomic Number

The property that the atomic number is constant for every specific element, unlike the number of neutrons which may vary.

Mass Number

The sum of protons and neutrons in the atom of a chemical element.

Atomic Mass

The total value made up of both protons and neutrons together.

Lithium ($Li$) Atomic Number

Represented by the subscript value of $3$, indicating the number of protons.

Lithium ($Li$) Mass Number

Represented by the superscript value of $7$, indicating the sum of protons and neutrons.