1. An atom is the smallest part of
How to draw atoms
An atom is the smallest part of
an element
Particle Charge Mass
Proton
Electron
Neutron + 1 -
1/2000 1

2. How to find protons electrons and neutrons
Mass Number 7 Li 3
Proton number
Bottom number P E n
Bottom number
Top - Bottom number

3. Need to know how to draw the first 20 atoms
Nucleus
2,8,8

4. Ions
Non-metals
Metals
Positive!!!
Negative

5. Ionic bonding
Metal and a non-metal + - Li F

6. Ionic structure Draw out sodium dots. Draw out fluorine Crosses.
Work out electron movement
Re-draw ions together.
Write the formula.

7. Sodium Fluoride + - Na F

8. More than one!!
Other elements like oxygen need 2
Electrons.

9. Sodium Oxide 2 O Na Na 2

10. Beryllium gives 2 electrons.- - 2+ F F Be 2
Beryllium fluoride.

11. Draw out the following KF
LiCl
Li2O
BeCl2
MgF2