11Na
Element 11
Sodium
Alkali metals
Sodium /ˈsoʊdiəm/ is a chemical element with symbol Na (from Ancient Greek Νάτριο) and atomic number 11.
Key data
- Atomic number
- 11
- Atomic mass
- 22.990 u
- Group / Period
- 1 / 3
- Block
- s-block
- Phase at STP
- Solid
- Density
- 0.968 g/cm³
- Melting point
- 97.8 °C
- Boiling point
- 882.9 °C
- Electron configuration
- [Ne] 3s1
Common uses
- •Table salt (with Cl)
- •Street lamps
- •Soap
Discovery
Year: 1807
Discovered by: Humphry Davy
Frequently asked questions
What is the atomic number of Sodium?
Sodium has atomic number 11. Its symbol is Na and its atomic mass is 22.99 u.
What category of element is Sodium?
Sodium is classified as alkali metals. It sits in group 1, period 3 of the periodic table.
What is Sodium used for?
Common uses of Sodium include: Table salt (with Cl), Street lamps, Soap.
When was Sodium discovered?
Sodium was discovered in 1807 by Humphry Davy.
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