7C1 Materials and Their Properties

Water vapour is water in which state?

• Solid

• Liquid

• fog

• gas

What are clouds made our of?

• Water in gas form

• Steam

• Ice crystals

• Tiny water droplets

Which of the following is the best description of an element?

• A substance that cannot be broken down into simpler substances

• A naturally occurring mineral made of more than one substance

• A small particle made with a specific chemical composition

• A collection of atoms that have different abilities when joined together

Hydrogen is considered an element, while hydrogen peroxide is considered a compound. This is because hydrogen peroxide is...

• is used for cleaning wounds.

• made of two different elements.

• is a liquid.

• useful to human beings.

How many elements are in the compound Fe₂O₃?

• 0

• 1

• 2

• 3

Provided is a list of five different substances.

NaOH     Cu    H₂O     N₂    H₂

How many of these substances are elements?

• 2

• 3

• 4

• 5

Which changes MUST happen for elements to become a compound?

• elements are heated

• a gas becomes a liquid

• elements dissolve in water

• chemical bonds form between atoms

When the elements copper (Cu) and oxygen (O) chemically combine, they form...

• an ion

• a gas

• a compound

• a mixture

NaCl represents 

• Sodium bicarbonate

• Nitrogen carbon

• Sodium chloride

• Nitrogen copper

Which chemical formula could be represented by this diagram?

• CuCl

• H₂

• C₆H₁₂O₆

• Co