Unit 1 Vocabulary 8th Grade

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

• Atom

• Atomic mass

• Atomic number

• Chemical property

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

average mass number of all atoms of an element (from particles in the nucleus)

• Atom

• Atomic mass

• Atomic number

• Chemical property

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

• Atom

• Atomic mass

• Atomic number

• Chemical property

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

• Atom

• Atomic mass

• Atomic number

• Chemical property

a property of a subatomic particle

• Electrical charge

• Electron

• Electron cloud

• Element

Tags

NGSS.MS-PS2-3

the negatively charged space containing electrons that surrounds the atomic nucleus

• Electrical charge

• Electron

• Electron cloud

• Element

a pure substance that cannot be broken down chemically into simpler substances

• Electrical charge

• Electron

• Electron cloud

• Element

the vertical columns on the Periodic Table

• Groups (families)

• Mass number

• Neutron

• Periods

total number of protons and neutrons in a specific atom

• Groups (families)

• Mass number

• Neutron

• Nucleus

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

• Periodic Table

• Periods

• Physical property

• Proton