1.0 Introduction to Chemistry

Question 1

Oxygen

Answer 1

O₂

Question 2

Hydrogen

Answer 2

H₂

Question 3

Chlorine

Answer 3

Cl₂

Question 4

Nitrogen

Answer 4

N₂

Question 5

Bromine

Answer 5

Br₂

Question 6

Phosphorus

Answer 6

P₄

Question 7

Water

Answer 7

H₂O

Question 8

Carbon dioxide

Answer 8

CO₂

Question 9

Ammonia

Answer 9

NH₃

Question 10

Methane

Answer 10

CH₄

Question 11

Carbon monoxide

Answer 11

CO

Question 12

Sulfur trioxide

Answer 12

SO₃

Question 13

Hydrochloric acid

Answer 13

HCl

Question 14

Nitric acid

Answer 14

HNO₃

Question 15

Sulfuric acid

Answer 15

H₂SO₄

Question 16

Phosphoric acid

Answer 16

H₃PO₄

Question 17

Ethanoic acid

Answer 17

CH₃COOH

Question 18

Ammonium ion

Answer 18

NH₄⁺

Question 19

Hydroxide ion

Answer 19

OH⁻

Question 20

Nitrate ion

Answer 20

NO₃⁻

Question 21

Hydrogencarbonate ion

Answer 21

HCO₃⁻

Question 22

Carbonate ion

Answer 22

CO₃²⁻

Question 23

Sulfate ion

Answer 23

SO₄²⁻

Question 24

Phosphate ion

Answer 24

PO₄³⁻

Question 25

Hydrogensulphate ion

Answer 25

HSO₄⁻

Question 26

Dihydrogenphosphate ion

Answer 26

H₂PO₄⁻

Question 27

Hydrogenphosphate ion

Answer 27

HPO₄²⁻

Question 28

Atom

Answer 28

The smallest particle of matter - is made up of protons, neutrons and electrons.

Question 29

Element

Answer 29

Only made of one sort of atom. Listed on the periodic table.

Question 30

Molecule

Answer 30

Two or more atoms covalently bonded together. The atoms can be of the same element or different elements.

Question 31

Compound

Answer 31

Two or more different types of atom bonded together. The bonding can either ionic or covalent.

Question 32

Mixture

Answer 32

Two or more different elements and/or compounds in the same space.

Question 33

Sulfur

Answer 33

S₈

Question 34

Acid

Answer 34

A substance that donates H⁺ ions.

Question 35

Base

Answer 35

A substance that accepts H⁺ ions

Question 36

Alkali

Answer 36

A base that releases OH⁻ ions in aqueous solution

Question 37

Salt

Answer 37

Formed when the hydrogen ions from an acid are replaced by a metal or an ammonium ion