Atoms

Question 1

Define the word element

Answer 1

An element is a substance made up of one type of atom.

Question 2

Is water a compound or element?

Answer 2

Water is a compound because it is made up of 2 elements , Hydrogen and oxygen.

Question 3

Is Iron a compound or element?

Answer 3

Iron is an element because it is pure and cannot be chemically broken down. It is only made up of iron particles.

Question 4

Describe the basic structure of an atom.

Answer 4

The atom consists of protons, neutrons, and electrons. The protons and neutrons are found withing the nucleus at the centre of the atom, and the electrons can be located in the atom’s energy levels (shells).

Question 5

Name the first 20 elements in the periodic table

Answer 5

Hydrogen H
Helium He
Lithium Li
Beryllium Be
Boron B
Carbon C
Nitrogen N
Oxygen O
Fluorine F
Neon Ne
Sodium Na
Magnesium Mg
Aluminium Al
Silicon Si
Phosphorus P
Sulphur S
Chlorine Cl
Argon Ar
Potassium K
Calcium Ca

Question 6

Name 3 diatomic elements.

Answer 6

Nitrogen
Oxygen
Hydrogen

Question 7

How many atoms does Sulphur have?

Answer 7

8

Question 8

Explain the significance of chemical symbols used in formulae and equations.

Answer 8

• They represent elements
• Simplify complex information
• Universal Scientific language