Counting Atoms

What is the big number at the beginning of a chemical formula called?

• Subscript

• Coefficient

Tags

NGSS.MS-PS1-1

How many atoms of Iron are in this compound?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many atoms of hydrogen are in

C₆H₁₂O₆

• 6

• 12

• 18

• 2

Tags

NGSS.MS-PS1-1

How many atoms of oxygen are in

3Fe₂O₃

• 6

• 9

• 18

• 2

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in H₂SO₄ ?

• 6

• 5

• 7

• 3

Tags

NGSS.MS-PS1-1

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

What does the subscript in a chemical formula tell you?

• How many molecules are present

• How many atoms are present

• How many elements are present

• How many neutrons are present

Tags

NGSS.MS-PS1-1

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

NaCl is the chemical formula for salt. Is NaCl considered a compound or an element?

• element

• compound

• both

• neither

Tags

NGSS.MS-PS1-1

We breathe oxygen. Its chemical formula is O_2. Is this formula an element or a compound?

• element

• compound

• neither

• both

Tags

NGSS.MS-PS1-1