1. Atomic Structure Visit www.worldofteaching.com
For 100’s of free powerpoints

2. All atoms are made up of just 3 basic sub-atomic particles:-
Name: Proton. Mass: 1 Charge: +1
Name: Neutron. Mass: 1 Charge: 0
Name: Electron. Mass: 1/2000 Charge: -1

3. H The Simplest Atom Name: Hydrogen Atomic Symbol: H1
Atomic Number
Mass Number
The Simplest Atom
Name: Hydrogen
Atomic Symbol: H
Mass Number (Number of Protons + Neutrons) = 1
Atomic Number (Number of Protons) = 1

4. He The Next Simplest Atom Name: Helium Atomic Symbol: He4 2
Name: Helium
Atomic Symbol: He
The centre of an atom is called the NUCLEUS
A Helium atom has two protons and two neutrons in its nucleus

5. Electron Configuration: 2,1
The Next Simplest Atom Li 7 3
Name: Lithium
Atomic Symbol: Li
The orbit nearest the nucleus can only contain 2 electrons
so the third electron must be in a new orbit.
Electron Configuration: 2,1

6. Be The Next Simplest Atom Name: Beryllium Atomic Symbol: Be This orbit9 4
Name: Beryllium
Atomic Symbol: Be
This orbit
has room for 8 electrons
Electron Configuration: 2,2

7. B The Next Simplest Atom Name: Boron Atomic Symbol: B 5p 6n11 5
Name: Boron
Atomic Symbol: B 5p 6n
Electron Configuration: 2,3

8. For the next 13 elements (Carbon to Argon)
draw their atomic structure and give details
as for Boron.
See the Periodic Table on p113 of your school planner
or the inside back cover of your Revision Guide.