PERIODIC TABLE 1

Which is a compound?

• sodium

• sugar

• nitrogen

• air

Which is classified as an element?

• carbon dioxide

• iron

• vinegar

• water

Which is the best example of a pure substance?

• peanuts

• milk

• gold

• air

An ice cube is put into a heated pan. What will most likely happen to the

molecules in the ice as the ice is heated?

• The molecules will begin to move slower.

• The molecules will begin to move faster

• The molecules will begin to increase in density.

• The molecules will begin to condense in the air.

What happens to water molecules during the boiling process?

• They move faster and move farther apart as they absorb heat.

• They move faster and remain close together as they absorb heat.

• They move more slowly but move farther apart as they lose heat.

• They move faster and move farther apart as they lose heat.

Which shows one example of a physical change and one example of a chemical change?

• boiling water and melting wax

• rusting iron and baking a cake

• dissolving powder and shredding paper

• freezing water and burning coal

Which is the best example of a chemical change?

• butter melting

• egg cooking

• paper tearing

• water evaporating

Which property of matter can easily be determined by looking at the periodic table?

• density

• solubility

• melting point

• chemical reactivity

A material can be identified by its behavior when chemically combined. Which property best supports this statement?

• density

• reactivity

• specific heat

• melting point

Which property determines the chemical reactivity of an element?

• atomic structure

• solubility

• density

• volume