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Sodium (Na)
Atomic number: 11 · Category: alkali metal · Group 1 · Period 3 · Phase: Solid
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.
Atomic mass: 22.989769282
Density: 0.968
Melting point: 370.944 K
Boiling point: 1156.09 K
Appearance: silvery white metallic
Source: Wikipedia
Block: s
Molar heat: 28.23
CPK color:#ab5cf2
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s1
Configuration (semantic): [Ne] 3s1
Shells: 2, 8, 1
Electronegativity (Pauling): 0.93
Electron affinity: 52.867
Ionization energies: 495.8, 4562, 6910.3, 9543, 13354, 16613, 20117, 25496, 28932, 141362, 159076
Periodic position
Group: 1
Period: 3
xpos: 1
ypos: 3
Spectral/Bohr images
Image
3D Model