IONIC BOND February 10, 2012 | No Comments | MOLECULES CHEMICAL BONDING Atoms in our planet are not by themselves, they are joined at least to another atom through a chemical bond. Bonds allow atoms […] Read More →
PERIODIC TABLE and ENERGY LEVELS January 20, 2012 | No Comments | ATOM The Periodic Table shows us all the known elements in our planet. In the Periodic Table, the elements are presented in increasing atomic number. Every […] Read More →