Atomic NumberAtomic Number 18
Atomic Number 18 is belong to element of Argon.
Chemical symbol for Argon is Ar. Number of protons in Argon is 18. Atomic weight of Argon is 39.948 u or g/mol.
18Ar
Atomic Number 18 Element Properties
| Atomic Number (Z) | 18 |
|---|---|
| Atomic Symbol | Ar |
| Element Name | Argon |
| Group | 18 |
| Period | 3 |
| Atomic Weight | 39.948 u |
| Density | 0.0017837 g/cm3 |
| Melting Point (K) | 83.8 K |
| Boiling Point (K) | 87.3 K |