HPS Atomic Theory and Periodic Table Flashcards

Front

Proton

Back

Subatomic particle located in the nucleus, or center, of the atom. It has a single positive (+) charge and a mass of 1AMU.

Front

Neutron

Back

Subatomic particle located in the nucleus, or center, of the atom. It has a zero (0), or neutral, charge and a mass of 1AMU.

Front

Electron

Back

Subatomic particle located outside the nucleus. It has a single negative (-) charge and essentially zero mass.

Front

Electron Cloud

Back

Region outside of the nucleus of the atom where the electrons are located.

Front

Energy Levels/Electron Shells

Back

Areas of the electron cloud where electrons are located.

Front

Valence Shell

Back

Outermost energy level in the electron cloud.

Front

Valence Electrons

Back

Electrons located on the outermost energy level. Responsible for reactivity and chemical bonding.

Front

Atomic Number

Back

This number tells how many protons reside in the nucleus and identifies the element.

Front

Isotopes

Back

Atoms that have the same number of protons but different numbers of neutrons.

Front

Atomic Mass

Back

The average mass of all the different isotopes that make up the element in the proportions found in nature.