1st Half Term

Question 1

A substance made up of one type of atom.

Answer 1

An element

Question 2

Made up of more than one element chemically bonded/joined

Answer 2

A compound

Question 3

More than one atom chemically joined together.

Answer 3

A molecule

Question 4

An element

Answer 4

A substance made up of one type of atom

Question 5

A compound

Answer 5

Made up of more than one element chemically joined/bonded

Question 6

A molecule

Answer 6

More than one atom chemically joined together

Question 7

What are the four main gases in the air?

Answer 7

Nitrogen
Oxygen
Carbon dioxide
Argon

Question 8

What are the four main gases found in air (chemical formula)?

Answer 8

N2
O2
CO2
Ar

Question 9

What is Nitrogen’s percentage in air?

Answer 9

78%

Question 10

What is oxygen’s percentage in air?

Answer 10

21%

Question 11

What is carbon dioxide’s percentage in air?

Answer 11

0.9%

Question 12

What is argon’s percentage in air?

Answer 12

0.04%

Question 13

Is nitrogen a molecule or an atom?

Answer 13

Molecule

Question 14

Is oxygen an atom or molecule?

Answer 14

Molecule

Question 15

Is carbon dioxide an atom or molecule?

Answer 15

Molecule

Question 16

Is argon an atom or a molecule?

Answer 16

Atom

Question 17

Is O2 an element or compound?

Answer 17

Element

Question 18

Is K an element or compound?

Answer 18

Element

Question 19

Is CO2 an element or a compound?

Answer 19

Compound

Question 20

Is Cu an element or a compound?

Answer 20

Element

Question 21

What is the name of NaO2?

Answer 21

Sodium oxide

Question 22

What is the name of CaCl2?

Answer 22

Calcium chloride

Question 23

What is the name of CuSO2?

Answer 23

Copper sulfate

Question 24

What is a chemical reaction in word equation form?

Answer 24

a+b(arrow)ab
E.g. copper+oxygen(arrow) copper oxide

Question 25

What is the difference between a compound and a mixture?

Answer 25

Compounds are substances which are only made from chemicals bonded elements whereas mixtures are substances formed from physically mixing two or more substances.

Question 26

How many oxygen atoms are there in CuO2?

Answer 26

2

Question 27

How many chlorine atoms are there in Cu(O2Cl3)3?

Answer 27

9

Question 28

When do we use -ide and -ate for endings of compounds?

Answer 28

-ide is for compounds without oxygen whereas -ate is for compounds with oxygen