Chemistry Y09 Autumn 2022/23

Question 1

1.1 Mixture

Answer 1

more than one substance that are not chemically joined together

Question 2

1.2 Compund

Answer 2

substance made from different elements chemically bonded together

Question 3

1.3 Element

Answer 3

a substance containing only one type of atom

Question 4

1.4 Formulation

Answer 4

a mixture that has been designed as a useful product

Question 5

1.5 Period

Answer 5

a row on the periodic table, which represents the number of electron shells of an element

Question 6

1.6 Group

Answer 6

a column on the periodic table, which represents the number of outer shell electrons of an element

Question 7

1.7 Ion

Answer 7

an electrically charged particle which has lost or gained electrons

Question 8

1.8 Molecule

Answer 8

a particle made from atoms joined together by covalent bonds

Question 9

1.9 Delocalised electrons

Answer 9

electrons which are free to move through a structure

Question 10

1.1 Trend

Answer 10

a pattern in the physical or chemical properties of substances

Question 11

2.1 Hydrochloric acid

Answer 11

HCl

Question 12

2.2 Sulfuric acid

Answer 12

H2SO4

Question 13

2.3 Nitric acid

Answer 13

HNO3

Question 14

2.4 Ammonia

Answer 14

NH3

Question 15

2.5 Sodium hydroxide

Answer 15

NaOH

Question 16

2.6 Sodium chloride

Answer 16

NaCl

Question 17

2.7 Copper Sulfate

Answer 17

CuSO4

Question 18

2.8 Hydrogen

Answer 18

H2

Question 19

2.9 Water

Answer 19

H2O

Question 20

2.1 Carbon dioxide

Answer 20

CO2