Answer:
Boron Atom.
Boron is a non metallic element and the only non-metal of the group 13 of the periodic table the elements. Boron is electron-deficient, possessing a vacant p-orbital. It has several forms, the most common of which is amorphous boron, a dark powder, unreactive to oxygen, water, acids and alkalis.
Discovered by: Sir Humphry Davy and J.L Gay-Lussac in 1808
Proton number: 5
Electron number: 5
Neutron number: 6
Nucleon number: 11
Isotopes: 2
Melting point: 2076 °C
Boiling point: 3927 °C