How to draw atoms ParticleChargeMass Proton Electron Neutron An atom is the smallest part of an element + - 0 1 1 1/2000.

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Presentation transcript:

How to draw atoms ParticleChargeMass Proton Electron Neutron An atom is the smallest part of an element /2000

How to find protons electrons and neutrons Li 3 7 Proton number Mass Number PEnPEn Bottom number Top - Bottom number

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

Ions Metals Non-metals Positive!!! Negative

Ionic bonding LiF +- Metal and a non-metal

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

NaF +- Sodium Fluoride

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

Sodium Oxide 2 Na O 2

Be F F Beryllium gives 2 electrons. Beryllium fluoride.

Draw out the following KF LiCl Li 2 O BeCl 2 MgF 2