Year 7 chemistry revision

How many atoms are there in this molecule?

• 2

• 3

• 4

• 5

Which 2 of these are pure elements?

• A

• B

• C

• D

Which one of these is a mixture?

• A

• B

• C

• D

Which one of these is a pure compound?

• A

• B

• C

• D

True or false? Chemical reactions are easily reversible

• True

• False

Tags

NGSS.HS-PS1-6

A material that burns to transfer energy is called a...

• compound

• wood

• fuel

• petrol

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

• magnesium

• magnesium and oxygen

• magnesium oxide

• oxygen

Tags

NGSS.HS-PS1-2

In the thermal decomposition of calcium carbonate:

Calcium carbonate --> Calcium oxide + ?

HINT: gas

• oxygen

• calcium

• carbon monoxide

• carbon dioxide

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which metal is the least reactive out of: copper, magnesium, zinc and iron?

• copper
• magnesium
• zinc
• iron

Which metal is the most reactive out of: copper, magnesium, zinc and iron?

• copper
• magnesium
• zinc
• iron