Atoms and Elements Vocabulary

Average mass of one atom of an element (from particles in the nucleus).

• Electrical Charge

• Atomic Number

• Atomic Mass

• Electron Cloud

The number of protons in the nucleus of an atom; used to determine an element's position in the periodic table.

• Atom

• Atomic Number

• Atomic Mass

• Proton

A negatively charged particle in the electron cloud surrounding the atomic nucleus

• Proton

• Neutron

• Electron

• Subatomic Particle

Tags

NGSS.MS-PS2-3

The negatively charged space containing electrons that surrounds the atomic nucleus.

• Electric Charge

• Valence Electrons

• Electron Cloud

• Atomic Mass

A neutral particle with no electrical charge within the atomic nucleus.

• Proton

• Neutron

• Electron

• Subatomic Particle

The positively charged center of an atom containing the protons and neutrons.

• Atom

• Electron Cloud

• Neutron

• Nucleus

A conceptual model in which the elements are organized according to their properties; often displayed as a chart.

• Periodic Table

• Location

• Element

• Electron Cloud

A positively charged particle within the atomic nucleus; used to identify an element.

• Proton

• Neutron

• Electron

• Subatomic Particle

Electron(s) located in outer energy level (electron shell).

• Electron

• Electrical Charge

• Valance Electron(s)

• Electron Cloud

Atom

• a pure chemical substance that cannot be physically split into a more simple substance.

• a particle of matter that has a negative electrical charge and travels around the nucleus of an atom.

• the smallest particle of an element that can exist.

• the part of an atom with a positive electrical charge at the center and that has most of the atom's mass.