elements

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Is water an element or a compound?

• Element
• Compound

Water (H₂O) freezing is an example of:

• A chemical change
• A physical change

A compound consists of two or more elements bound together.

• True
• False

Is Iron (Fe) an element or a compound?

• Element
• Compound

You drop two Alka-Seltzer tablets in a glass of water and immediately see bubbles coming up through the water. They probably indicate:

• A change of color
• Formation of a gas
• A change in temperature
• Formation of a precipitate

When we mixed milk and vinegar in the lab demonstration, a/an ______________ was created.

• cheese
• new food
• precipitate
• element

Compounds are made up of two or more atoms physically combined.

• True
• False

Air is a compound.

• True
• False

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4