There
are about 100 different types of atom making the stuff of
our world.
98% of the Earth’s
crust is made from just 9 different
types of atom.
Six types of atom
make up 98.8 % of the substances of the human
body. The rest is made of 19 more types of
atom. Some types of atom – such as iron - are
only present in small amounts but are still very important.
