How to draw atoms

Particle Charge Mass

ProtonElectronNeutron

An atom is the smallest part of an element

+-0 1

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How to find protons electrons and neutrons

Li3

7

Proton number

Mass Number

PEn

Bottom numberBottom numberTop - Bottom number

Need to know how to draw the first 20 atoms

Nucleus

2,8,8

Ions

Metals

Non-metals

Positive!!!

Negative

Ionic bonding

Li F+ -

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.

Na F+ -

Sodium Fluoride

More than one!!

Other elements like oxygen need 2 Electrons.

Sodium Oxide

2

Na

Na

O

2

Be F2+ -F -

2

2

Beryllium gives 2 electrons.

Beryllium fluoride.

Draw out the following

• KF

• LiCl

• Li2O

• BeCl2• MgF2