Counting Atoms

How many Potassium (K) are in the compound shown in the image?

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

How many carbon (C) are in the compound shown in the image?

• 1

• 3

• 4

• 12

Tags

NGSS.MS-PS1-1

How many Oxygen (O) are in the compound shown in the image?

• 1

• 3

• 4

• 12

Tags

NGSS.MS-PS1-1

How many Phosphorus (P) are in the compound shown in the image?

• 2

• 7

• 10

• 15

Tags

NGSS.MS-PS1-1

How many Oxygen (O) are in the compound shown in the image?

• 3

• 8

• 10

• 15

Tags

NGSS.MS-PS1-1

How many Oxygen (O) are in the compound shown in the image?

• 5

• 6

• 10

• 24

Answer explanation

Tags

NGSS.MS-PS1-1

How many Zinc (Zn) are in the compound shown in the image?

• 4

• 6

• 8

• 24

Answer explanation

Tags

NGSS.MS-PS1-1

How many Nitrogen (N) are in the compound shown in the image?

• 1

• 2

• 8

• 32

Answer explanation

Subscripts inside and outside the bracket multiply together.

Coefficients multiply by the subscripts.

Tags

NGSS.MS-PS1-1

How many Nitrogen (N) are in the compound shown in the image?

• 3

• 4

• 7

• 12

Answer explanation

Subscripts (the small number after an atom) inside and outside the bracket multiply together.

Coefficients (the big number out front) apply to ALL atoms in the compound. They get multiplied by any subscripts.

Tags

NGSS.MS-PS1-1

How many Oxygen (O) are in the compound shown in the image?

• 3

• 10

• 13

• 30

Answer explanation

Subscripts (the small number after an atom) inside and outside the bracket multiply together.

Coefficients (the big number out front) apply to ALL atoms in the compound. They get multiplied by any subscripts.

Tags

NGSS.MS-PS1-1