Activate 1 - Chapter C2 - Elements, Atoms, Compounds, Mixtures

Question 1

Atom

Answer 1

The smallest part of an element that can exist.

Question 2

Compound

Answer 2

A substance made up of atoms of two or more elements, strongly joined together.

Question 3

Molecule

Answer 3

A group of two ore more atoms, strongly joined together.

Question 4

1. H

Clue: Atomic No. 1

Answer 4

Hydrogen

Question 5

2. He

Clue: Atomic No. 4

Answer 5

Helium

Question 6

3. Li

Clue: Atomic No. 7

Answer 6

Lithium

Question 7

4. Be

Clue: Atomic No. 9

Answer 7

Beryllium

Question 8

B

Answer 8

Boron

Question 9

C

Answer 9

Carbon

Question 10

N

Answer 10

Nitrogen

Question 11

O

Answer 11

Oxygen

Question 12

F

Answer 12

Fluorine

Question 13

Ne

Answer 13

Neon

Question 14

Na

Answer 14

Sodium

Question 15

Mg

Answer 15

Magnesium

Question 16

Al

Answer 16

Aluminium

Question 17

S

Answer 17

Silicon

Question 18

Phosphorus

Answer 18

P

Question 19

Sulphur

Answer 19

S

Question 20

Chlorine

Answer 20

Cl

Question 21

Argon

Answer 21

Ar

Question 22

Potassium

Answer 22

K

Question 23

Ca

Answer 23

Cacium

Question 24

Salt

Answer 24

NaCl

Sodium + Chlorine

Question 25

Water

Answer 25

H O 2 Hydrogen + Oxygen

2

Question 26

Carbon Dioxide

Answer 26

CO
2

Carbon + 2 Oxygen

Question 27

Hydrochloric Acid

Answer 27

HCl

Hydrogen + Chlorine

Question 28

Sulphuric Acid

Answer 28

H SO
2 4

2 Hydrogen + Sulphur + Oxygen

Question 29

Methane

Answer 29

CH
4

Carbon + 4 Hydrogen

Question 30

Iron Sulphate

Answer 30

FeS

Iron + Sulphur

Question 31

Periodic Table

Answer 31

The table with all the elements, in which elements with similar properties are grouped together.

Question 32

Chemical Symbol

Answer 32

A one or two-letter code for an element that is used by scientists in all countries.

Question 33

Chemical Formula

Answer 33

A formula that shows the relative number of atoms of each element in a compound