Science STAAR

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

• Atom

• System

• Science

• Properties

• Personal protective equipment (PPE)

Tags

NGSS.MS-PS1-1

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

• Atomic mass

• Atom

• System

• Science

• Properties

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

• Atomic number

• Atomic mass

• Atom

• System

• Science

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

• Chemical property

• Atomic number

• Atomic mass

• Atom

• System

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

• Electrical charge

• Chemical property

• Atomic number

• Atomic mass

• Atom

Tags

NGSS.MS-PS2-3

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

• Electron

• Electrical charge

• Chemical property

• Atomic number

• Atomic mass

Tags

NGSS.MS-PS1-1

the negatively charged space containing electrons that surrounds the atomic nucleus

• Electron cloud

• Electron

• Electrical charge

• Chemical property

• Atomic number

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

• Element

• Electron cloud

• Electron

• Electrical charge

• Chemical property

the vertical columns on the Periodic Table

• Groups (families)

• Element

• Electron cloud

• Electron

• Electrical charge

total number of protons and neutrons in a specific atom

• Mass number

• Groups (families)

• Element

• Electron cloud

• Electron