Atomic Structure Vocabulary

Smallest particle of an element

• Atom
• Halogens
• Alkali Metals
• Physical Properties
• Chemical Properties

Tags

NGSS.MS-PS1-1

a particle found in the nucleus with a positive charge exactly equal and opposite to the electron.

• Proton
• Atom
• Halogens
• Alkali Metals
• Physical Properties

a particle found in the nucleus with a mass similar to the proton but with zero electric charge.

• Neutron
• Proton
• Atom
• Halogens
• Alkali Metals

a particle with an electrical charge (-e) found inside of atoms but outside the nucleus.

• Electron
• Neutron
• Proton
• Atom
• Halogens

electrons in the highest unfilled energy level of an atom. These electrons participate in chemical bonds.

• Valence Electrons
• Electron
• Neutron
• Proton
• Atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

the number of protons in the nucleus. The atomic number determines what element the atom represents.

• Atomic Number
• Valence Electrons
• Electron
• Neutron
• Proton

the number of protons plus the number of neutrons in the nucleus.

• Mass Number
• Atomic Number
• Valence Electrons
• Electron
• Neutron

atoms of the same element that have different numbers of neutrons in the nucleus.

• Isotope
• Mass Number
• Atomic Number
• Valence Electrons
• Electron

the average mass of all known isotopes of an element, expressed in amu.

• Atomic Mass
• Isotope
• Mass Number
• Atomic Number
• Valence Electrons

a pure form of matter that cannot be broken into other elements. There are about 90 elements that occur naturally.

• Element
• Atomic Mass
• Isotope
• Mass Number
• Atomic Number

Tags

NGSS.HS-PS1-1