Counting elements and atoms

How do you know when there is a different element?

• Capital letter

• lower case letter

• subscripts

• coefficients

Tags

NGSS.MS-PS1-1

How do you count atoms

• subscripts only

• coefficients only

• subscripts and coefficients

• capital letters

Tags

NGSS.MS-PS1-1

How many elements are in H₂O

• 3

• 2

• 1

• 4

Tags

NGSS.MS-PS1-1

How many elements are in CO₂

• 3

• 4

• 1

• 2

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆

• 3

• 6

• 24

• 4

Tags

NGSS.MS-PS1-1

How many ATOMS are in H₂O₂

• 4

• 2

• 1

• 8

Tags

NGSS.MS-PS1-1

How many ATOMS are in CO

• 1

• 2

• 4

• 3

Tags

NGSS.MS-PS1-1

How many elements are in 2C₆H₁₂O₆

• 48

• 24

• 3

• 2

Tags

NGSS.MS-PS1-1

How many ATOMS are in 2H₂O₂

• 4

• 2

• 8

• 6

Tags

NGSS.MS-PS1-1

What's the job of the coefficient?

• Tells how many molecules, so you multiply

• Addition

• Add it to the subscripts

• Tells how many molecules, so you divide

Tags

NGSS.MS-PS1-5