Counting Atoms and Periodic Table

How many Magnesium atoms are in 10MgCl₂?

• 10

• 5

• 20

• 12

Tags

NGSS.MS-PS1-1

How many atoms of Carbon are in the compound C₂H₈O ?

• 8

• 2

• 1

• 11

Tags

NGSS.MS-PS1-1

How many TOTAL atoms are in the compound?
C₂H₈O 

• 11

• 2

• 8

• 1

Tags

NGSS.MS-PS1-1

How many elements are in the compound C₂H₈O ?

• 2

• 1

• 3

• 0

Tags

NGSS.MS-PS1-1

How many protons does this isotope of titanium have?

• 48

• 22

• 26

• 70

Tags

NGSS.MS-PS1-1

How many protons does Sodium (Na) have?

atomic # = 11 mass # = 23

• 23

• 12

• 11

• 2

A subscript is the small number below the element symbol that tells the number of _______ of that element.

• atoms

• valence electrons

• protons

• elements

Tags

NGSS.MS-PS1-1

The red numbers in the image below represent ________

• subscripts

• coefficients

• I don't know, and don't want to try

• None of the answers are correct

How many atoms of Hydrogen are in this compound

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

The number of Na's in Na₂CO₃

• 1

• 2

• 3

• 6

Tags

NGSS.MS-PS1-1