AllotropesElements in pure form have a distinctive form.

You can recognize aluminum, gold and copper in pure forms.Some elements in pure form can have more than one different form.

Allotropes - Allotropes - Different molecular forms of the same element

Oxygen Example

O2 Normal oxygen O3 Ozone

Poisonous blue gas created in the lower atmosphere by lightning.

Carbon

Graphite Solid gray, slippery

Diamond Clear, very strong crystal

Buckminster fullerene

60 carbon ball, hollow in center

Can be turned into buckytube

Buckyball

These tubes can be made into wires for use in nanotechnology

States of the elementsLiquids

Gases

Diatomic substances

Monoatomic substances

Br2

Hg

H2, N2 O2 F2 Cl2 All noble gases

H2 N2 O2 F2Cl2

Br2 - liquidI2 – solid

Noble gases