Nick+ray+MASC

|| || **Atomic mass** Atomic Num: 11Atomic Symbol: Na ||
 * 22.98977 g.mol -1 ||
 * **Electronegativity according to Pauling** || 0.9 ||
 * **Density** || 0.97 g.cm -3 at 20 °C ||
 * **Melting point** || 97.5 °C ||
 * **Boiling point** || 883 °C ||
 * **Vanderwaals radius** || 0.196 nm ||
 * **Ionic radius** || 0.095 (+1) nm ||
 * **Isotopes** || 3 ||
 * **Electronic shell** || [Ne] 3s1 ||
 * **Energy of first ionisation** || 495.7 kJ.mol -1 ||
 * **Standard potential** || - 2.71 V ||
 * **Discovered by** || Sir Humphrey Davy in 1807 ||

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**Common Uses of Sodium** **Medicine Agriculture Manufacture of organic compounds To purify molten metals Sodium carbonate / hydroxide soap cleaners Sodium bicarbonate / chloride / hypochlorite / nitrate / silicate**