K) 71 Thermal Conductivity 141 Specific Heat 1.23 Heat of Fusion 2.598 Heat of Vaporization 96.96 Atomic Number of Sodium.Sodium – Properties Element Sodium Atomic Number 11 Symbol Na Element Category Alkali Metal Phase at STP Solid Atomic Mass 22.9897 Density at STP 0.968 Electron Configuration 3s1 Possible Oxidation States -1 +1 Electron Affinity 52.8 Electronegativity 0.93 1st Ionization Energy 5.1391 Year of Discovery 1807 Discoverer Davy, Sir Humphry Thermal properties Melting Point 97.8 Boiling Point 883 Thermal Expansion µm/(m
