11
Na
22.99
Sodium (Na)
Element 11 · Period 3 · Group 1
alkali-metal
solid at room temp
s-block
About Sodium
Highly reactive soft metal. Essential electrolyte in biological systems. Main component of table salt (NaCl).
Physical Properties
Atomic Mass
22.99 u
State at 25°C
Solid
Melting Point
97.72 °C
Boiling Point
883 °C
Density
0.971 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Ne] 3s¹
Electron Shells
2, 8, 1
Electronegativity
0.93
Atomic Radius
190 pm
Ionization Energy
496 kJ/mol
Oxidation States
+1
Discovery & History
Discovered By
Humphry Davy
Discovery Year
1807
Named By
Humphry Davy
Name origin: English: soda; Symbol from Latin: natrium
Frequently Asked Questions
- Is Sodium a metal, nonmetal, or metalloid?
- Sodium is classified as a alkali-metal.
- What state is Sodium in at room temperature?
- Sodium is a solid at standard room temperature (25°C).
- What is the atomic mass of Sodium?
- Sodium has an atomic mass of 22.99 atomic mass units (u).
- Who discovered Sodium?
- Sodium was discovered by Humphry Davy in 1807.
- Where is Sodium on the periodic table?
- Sodium is element number 11, located in period 3 and group 1.