Argon is the 18th element of the periodic table. Its atomic weight is 39.948 u and its symbol is Ar. It is rare in the Universe and it is a non-metal. Argon is not very needed, but there is traces of it in the human body. There is 8 electrons in its outermost shell. Naturally, Argon cannot bond with any other atom because of its full valence shell. It has numerous uses as lamps, and you could also make a light if you send electricity in it.
Atomic name: Argon Melting point: -189.4°C, -308.8°F
Atomic number: 18 Boiling point: -185.8°C, -302.5°F
Atomic weight: 39.948 u
Elemental Category: non-metal
Colour: colourless as gas, white with a purple tint as liquid
Previous element: Chlorine Next Potassium