Stability of Noble Gas

• Noble gases are the elements in group 18.
• These gases are stable is because they have a stable duplet or octet electron arrangement at the valence shell.
• Duplet electron arrangement is referring to Helium, and octet electron arrangement is referring to other elements in group 18.
• The electron arrangements of these elements make the elements chemically non-reactive as it is very stable.

Condition for the Formation of Chemical Bonds

• Noble gas does not form any bond, as it has a very stable electron arrangement.
• The formation of a bond can happen between elements in group 1 to group 17.
• Group 1 has only one valence electron, whereas group 17 only has seven valence electrons.
• These elements do not have a stable duplet or octet electron arrangement.
• Therefore, these elements are reactive and able to form a bond.
• There are two types of bonds.
  • Ionic bond (donate or receive electron)
  • Covalent bond (share electron(s))
• The process of the formation of ionic bond and covalent bond, only involve valence electron(s).