Compounds May Be Represented by Chemical Formulas

Representation of the number of atoms of each element used to identify a substance

• Molecule

• Compound

• Chemical Formula

• Subscript

Which of the following is a compound?

• Co
• He
• CO
• H

Tags

NGSS.MS-PS1-1

Is salt NaCl a compound or a element?

• Element
• Compound

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are in one water molecule? (water = H₂O)

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

How many carbon atoms are in one molecule of carbon dioxide? (carbon dioxide = CO₂₎

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

How many atoms IN TOTAL make up one molecule of glucose? (glucose = C₆H₁₂O₆₎

• 6

• 12

• 18

• 24

Tags

NGSS.MS-PS1-1

The number of atoms of an element present in one molecule of a substance

• Molecule

• Compound

• Chemical Formula

• Subscript

Tags

NGSS.MS-PS1-1

A chemical formula is provided. How many atoms of hydrogen (H) are found in this substance?

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

A chemical formula is shown. The subscripts in a chemical formula represent the –

• number of atoms of the element in front of the subscript.

• atomic mass of the heaviest element in the compound.

• atomic number of the element that follows the subscript.

• column on the Periodic Table of the element next to it.

Tags

NGSS.MS-PS1-1

A student created a chart to show some common compounds. Which of the following chemical formulas is written correctly?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1