Phase Changes and Molecules

Molecules are

• A single atom by itself

• A single element by itself

• 2 or more elements bonded together

• 2 or more atoms bonded together

This is H₂O. How many Hydrogen atoms are there?

• 1

• 2

• 3

• 0

This is Carbon Dioxide - CO₂ How many Oxygen atom are there?

• 2

• 1

• 3

• 0

This is Methane - CH₄. What color represents Hydrogen in this picture?

• red

• blue

• I don't know

• Methane smells!

How many different elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 24

What is the name of this molecule?

• Water

• Carbon Dioxide

• Methane

• Ammonia

How many Carbon atoms are in C₂H₈O ?

• 11

• 1

• 8

• 2

How many Nitrogen atoms are in NH₃?

• 3

• 1

• 4

• 5

What is the chemical symbol for the element Carbon?

• Ca

• CO₂

• C

• Cd

What is the chemical symbol for the element Hydrogen?

• H

• He

• h

• he