The basic particle from which all elements are made; the smallest particle of an element that has the properties of that element:

• Atom
• Compound
• Molecule
• Proton

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A tiny particle that moves around the outside the nucleus of an atom:

• Photon
• Neutron
• Electron
• Proton

The central core of an atom which contains protons and neutrons:

• nucleus
• core
• center
• nucleolus

A small positively charged particle that is found in the nucleus of an atom:

• proton
• photon
• neutron
• electron

A small particle in the nucleus of an atom with no electrical charge:

• electron
• proton
• photon
• neutron

The number of protons in the nucleus of an atom:

• Neutron number
• Electron number
• Atomic number
• Mass number

An atom with the same number of protons and a different number of neutrons from other atoms of the same element:

• Compound
• Molecule
• Elementary particle
• Isotope

The sum of protons and neutrons in the nucleus of an atom:

• Electron number
• Nuclear charge
• Atomic number
• Atomic mass number

The average mass of all the isotopes of an element:

• Sum of the masses of all isotopes
• Mass Number

• Atomic Number

• Atomic Mass

An arrangement of the elements showing the repeating pattern of their properties:

• Periodic Table
• Elementary Table
• Sequential Chart
• Cyclical Graph