Atoms & Periodic Table Vocabulary

The smallest particle of an element that maintains the properties of that element.

• neutron

• molecule

• atom

• electron

The average mass of one atom of an element from particles in the nucleus.

• atomic mass

• electron cloud

• periods

• physical property

Tags

NGSS.MS-PS1-1

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

• subatomic particle

• electrical charge

• atomic number

• electron cloud

A characteristic of a substance that describes how it combines with other substances to form new ones.

• atomic mass

• physical property

• electrical charge

• chemical property

Tags

NGSS.MS-PS1-2

A property of a subatomic particle; positive (protons), negative (electrons), or neutral (neutrons).

• physical property

• atomic mass

• chemical property

• electrical charge

Tags

NGSS.MS-PS2-3

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

• electron

• period

• proton

• neutron

Tags

NGSS.MS-PS2-3

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

• atom

• atomic mass

• electron cloud

• nucleus

A pure substance that cannot be broken down chemically into simpler substances.

• element

• proton

• nucleus

• electron

The vertical columns on the Periodic Table.

• row

• valence

• groups

• periods

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

• neutron

• proton

• group

• electron

Tags

NGSS.MS-PS1-1