Counting Atoms in Chemical Formulas Practice

How many carbon atoms (C) are in a CO₂ molecule?

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-1

How many Oxygen atoms (O) are in a  molecule  of CO₂

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-1

How many Hydrogen atoms (H) are in a molecule of H₂O?

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-1

How many atoms of hydrogen are in a molecule of glucose (C₆H₁₂O₆)?

• 12

• 6

• 18

• 4

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Coefficients in chemical formulas...

• Multiply just the first atom

• Add to the subscripts at the end of the molecule

• Multiply elements without subscripts

• Multiply EVERYTHING!

Tags

NGSS.MS-PS1-1

A ______ is a number written in front of a chemical formula.

• Coefficient

• Subscript

• Exponent

• Coordinator

How many carbon atoms in 2C₆H₁₂O₆ ?

• 2

• 6

• 8

• 12

Tags

NGSS.MS-PS1-1

How many oxygen atoms in 2C₆H₁₂O₆ ?

• 2

• 6

• 8

• 12

Tags

NGSS.MS-PS1-1

How many Nitrogen atoms are in (NH₄)₂CrO₄?

• 1

• 2

• 8

• 16

Tags

NGSS.MS-PS1-1