Atoms & Molecules
How do atoms exist?
Atoms of most elements cannot exist independently
Atoms form molecules or ions
Molecules or ions aggregate to form matter that we can see, feel and touch
Molecule
A molecule is a group of two or more atoms that are chemically bonded
A molecule can be defined as the smallest unit of an element or compound that is capable of independent existence and shows all the properties of that substance
Atoms of same element or different elements can join together to form molecules
O2
H2O
Molecules of elements
Molecules of compounds
Atomicity - The number of atoms constituting a molecule
Monoatomic
Diatomic
Tetra-atomic
Tri-atomic
Poly-atomic
- Argon
- Helium
- Oxygen
- Hydrogen
- Nitrogen
- Chlorine
- Ozone
- Phosphorus
- Sulphur