1. 20/09/2018
Atoms and Elements
W Richards
The Weald School

2. Atoms
20/09/2018
Atoms are the “building blocks” of all matter and are the simplest form of molecule. They are all made up of protons, neutrons and electrons. They look something like this:
The Nucleus – this contains neutrons and protons
Electrons – these orbit around the nucleus

3. These atoms are ALL iron – there’s nothing else in here
Elements
20/09/2018
If a solid, liquid or gas is made up of only one type of atom we say it is an element. For example, consider a tripod made up of iron:
These atoms are ALL iron – there’s nothing else in here

4. Sodium chloride (salt)
Compounds
20/09/2018
Compounds are different to elements. They contain different atoms. Here are some examples:
Sodium chloride (salt)
Methane
Glucose

5. Some simple compounds…
20/09/2018
Methane, CH4
Carbon dioxide, CO2
Water, H2O
Key
Hydrogen
Oxygen
Carbon
Sulphur
Sulphuric acid, H2SO4
Ethyne, C2H2

6. Elements and symbols that you should know:
20/09/2018
Elements and symbols that you should know:
Part 1 – The obvious ones:
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen H He Li Be B C N
Oxygen
Fluorine
Neon
Magnesium
Aluminium
Silicon
Phosphorus O F Ne Mg Al Si P

7. Some more obvious ones:
20/09/2018
Some more obvious ones:
Sulphur
Chlorine
Argon S Cl Ar
18) Calcium
19) Zinc Ca Zn
The less obvious ones:
Sodium
Potassium
Iron
Copper
Silver Na K Fe Cu Ag
6) Tin
7) Gold
8) Mercury
9) Lead Sn Au Hg Pb