An atom is the smallest part of

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Presentation transcript:

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

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

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

Ions Non-metals Metals Positive!!! Negative

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

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

Sodium Fluoride + - Na F

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

Sodium Oxide 2 O Na Na 2

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

Draw out the following KF LiCl Li2O BeCl2 MgF2

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