Counting Atoms

How many different elements are present in H₂C₂H₃O₂?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which of these elements is not present in NaNO₃?

• sodium

• hydrogen

• oxygen

• nitrogen

Tags

NGSS.MS-PS1-1

How many magnesium atoms are found in MgCl₂?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many aluminum atoms are found in Al₂O₃?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many sulfur atoms are present in Al₂(SO₄)₃

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

A subscript will tell you the number of atoms of the element ___ it

• after

• before

Tags

NGSS.MS-PS1-1

A subscript behind a set of parentheses belongs to

• the element right before it

• all the elements within the parentheses before it

• all the elements in the parenthese after it

• the element right after it

Tags

NGSS.MS-PS1-1

If there is no subscript, how many atoms of that element are there?

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-1

How many atoms of carbon are in this compound?

H₂C₃O₄N₅

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

How many oxygen atoms are found here?

Mg(NO₃)₂

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1