Name: Hydrogen
Symbol: H
Atomic Number: 1
AtomicWeight: 1.007940
Family: non metals
CAS RN: 1333-74-0
Description: Colorless gas (the lightest gas known)
State (25 °C): Gas
Melting Point: 13.99 °K
Boiling Point: 20.271 °K
Density: 0.00008988 g/cm³
Oxidation states: +1,-1
Electron Configuration: 1s¹
Radius: 25 pm (Covalent)
Electronegativity: 2.2 (Pauling Scale)

1st Ionization Energy: 1312 KJ/mole
2nd Ionization Energy: – KJ/mole
3rd Ionization Energy: – KJ/mole