11 Na 22.989769282

Sodium

ALKALI METAL

Phase: Solid

Discovered: Humphry Davy

Block: S

Summary

Sodium /ˈsoʊdiəm/ is a chemical element with symbol Na (from Ancient Greek Νάτριο) and atomic number 11. It is a soft, silver-white, highly reactive metal. In the Periodic table it is in column 1 (alkali metals), and shares with the other six elements in that column that it has a single electron in its outer shell, which it readily donates, creating a positively charged atom - a cation.

Appearance: silvery white metallic

Source: Wikipedia

Physical Properties

Atomic Mass 22.989769282 u

Density 0.968 g/cm³

Melting Point 370.944 K

Boiling Point 1156.09 K

Molar Heat 28.23 J/(mol·K)

Electron Affinity 52.867 kJ/mol

Ionization Energies

1^st: 495.8 kJ/mol

2^nd: 4562 kJ/mol

3^rd: 6910.3 kJ/mol

4^th: 9543 kJ/mol

5^th: 13354 kJ/mol

6^th: 16613 kJ/mol

7^th: 20117 kJ/mol

8^th: 25496 kJ/mol

9^th: 28932 kJ/mol

10^th: 141362 kJ/mol

11^th: 159076 kJ/mol