Atomic NumberAtomic Number of Sodium
Atomic Number of Sodium is 11.
Chemical symbol for Sodium is Na. Number of protons in Sodium is 11. Atomic weight of Sodium is 22.98976928 u or g/mol. Melting point of Sodium is 97,8 °C and its the boiling point is 892 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Sodium
Sodium is one of the oldest known chemical elements since it is essential for human life. It is consumed by all of us in the form of salt we use for cooking many types of foods, but is a bit dangerous for human body in high amounts (causes high blood pressure). Sodium is a soft metal and is the 6th most common chemical element on our planet. Sodium is a reactive element, especially with water and other chemical compounds, that is why it can not be found in nature as metal. The number of common sodium compounds is quite large (with sodium chloride being the most common of those), and they are used in plenty of industries, including toothpaste production, producing soaps, foodstuffs, as well as industrial and nuclear chemistry, and many others.
Properties of Sodium Element
| Atomic Number (Z) | 11 |
|---|---|
| Atomic Symbol | Na |
| Group | 1 |
| Period | 3 |
| Atomic Weight | 22.98976928 u |
| Density | 0.971 g/cm3 |
| Melting Point (K) | 370.87 K |
| Melting Point (℃) | 97,8 °C |
| Boiling Point (K) | 1156 K |
| Boiling Point (℃) | 892 °C |
| Heat Capacity | 1.228 J/g · K |
| Abundance | 23600 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Alkali metal |
| Electronegativity (Pauling) χ | 0.93 |
| Ionization Energy (eV) | 5.13908 |
| Atomic Radius | 180pm |
| Covalent Radius | 154pm |
| Van der Waals Radius | 227 |
| Valence Electrons | 1 |
| Year of Discovery | 1807 |
| Discoverer | Davy |