Elements and Compounds

A pure substance that cannot be broken down into simpler substance by a chemical reaction.

• compound

• element

• solid

• liquid

A chemical combination of two or more elements

• element

• liquid

• solid

• compound

Tags

NGSS.MS-PS1-1

Two or more atoms chemically combined

• compound

• molecule

• element

• solid

Tags

NGSS.MS-PS1-1

The number before the compound formula: it represents the number of molecules that are present

• element

• subscript

• coefficient

• compound

The number to the lower right of an element symbol in a compound formula that represents the number of atoms for that element.

• subscript

• coefficient

• element

• molecule

Tags

NGSS.MS-PS1-1

The one or two letter representation of an element. Symbols are often derived from the Latin name of the element

• atomic number

• element symbol

• element name

• atomic mass

Two atoms of the same element bonded together

• monatomic

• element number

• diatomic

• compound

Tags

NGSS.MS-PS1-1

Elements that can exist as a single atom

• diatomic

• monatomic

• compound

• molecule