Lithium is the 3rd element of the periodic table. İt is highly reactive because it is an unstable and vulnurable atom, it falls under the alkali catagory. Atomic number: 3, Symbol: Li. He is a very sleepy guy, two of his little sleepy eyes on the nucleus. Two electrons orbitting in the inner shell and one more electron orbitting on the outer shell. He has 3 protons and 3 neutrons. He reacts with water VERY aggressively, HE HATES MOİSTURE!! Melting point is 180 degrees celsius, boiling point 1330