Elements, Compounds, & Changes in Matter

A compound is made of 2 or more different elements.

• False

• True

Tags

NGSS.MS-PS1-1

Is C₂ an element or compound?

• element
• compound

Tags

NGSS.MS-PS1-1

C₂ is also a molecule.

• False

• True

Tags

NGSS.MS-PS1-1

How many different elements are in the compound?

• 12

• 3

• 24

• 6

Tags

NGSS.MS-PS1-1

Elements are made of 

• many types of atoms 
• one type of atom 

→2H₂O
This number shows how many molecules/compounds are present.

• coefficient
• subscript
• superscript

• variable

 2H₂O
How many hydrogen atoms are present?

• 2
• 4
• 1
• 10

Tags

NGSS.MS-PS1-1

2H₂O
How many oxygen atoms are present?

• 2
• 4
• 1
• 5

Tags

NGSS.MS-PS1-1

4H₂O
How many H₂O molecules are present?

• 1
• 2

• 4

• 8

Tags

NGSS.MS-PS1-1

What does this image represent?

• Atom
• Element
• Compound

Tags

NGSS.MS-PS1-1