Wednesday, March 18, 2009

Tom 14 lesson 3

Hi everyone,

What are atoms?
The atom is a basic unit of matter.
Matter are used to create atoms.
Atoms are used to create elements.
Elements are used to create molecules.
There are 90 types of natural occurring kind of atoms.

What are crystalline structures?
Gemstones are crystalline structures.
The arrangement of atoms in crystals determine crystalline structures
There are 7 different types of crystalline structures.

cubic
hexagonal
tetragonal
rhombohedral
orthombic
monoclinic
tryclinic

1 comment:

Mr Dredge said...

Very interesting, Tom. Some good research!