Lithium is the chemical element of atomic number 3, a soft silver-white metal. It is the lightest of the alkali metals. The two main parts of every atom are neutrons and protons. The three main subatomic particles that form an atom are protons, neutrons, and electrons. Electrons are the smallest of the three particles that make up atoms. Electrons are found in shells or orbitals that surround the nucleus of an atom. Protons and neutrons are found in the nucleus. They group together in the center of the atom. Protons has mass (g) of1.673 x 10-24, Mass (amu) is 1 and location is nucleus, Neutrons has mass (g) of 1.675 x 10-24, mass (amu) is 1 and location is nucleus, and electrons has mass (g) of 9.109 x 10-28, mass (amu) is 0.0005, and location
