Physical properties- electronic configuration ,atomic radii, …

1. The electronic configuration for them are ns²np⁶

• Helium 1s ²2s²
• Neon 1s²,2s²,2p⁶
• Argon 1s²,2s²,2p⁶,3s²,3p⁶
• krypton1s²,2s²,2p⁶,3s²,3p64s²3d¹⁰4p6
• xenon 1s²,2s²,2p⁶,3s²,3p64s²3d¹⁰4p⁶4d¹⁰5s²5p⁶
• radon 1s²,2s²,2p⁶,3s²,3p64s²3d¹⁰4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰6s²6p⁶

2.Atomic size : : It increases down the group as every time a new shell is added as we move down. They actually have Vander wall radii.

1. Ionization energy: They have highest ionization energy due to complete octet.
2. 4. Electron gain Enthalpy: It is positive as they have complete octet so they have no attraction for incoming electron.
3. Melting and boiling point: It is low due to weak force that exists that is Vander wall force.

Down the group size increases therefore Vander wall force also increases so as melting and boiling point increase.

1. All noble gases are odorless and colorless and tasteless.
2. All noble gases are sparingly soluble in water.
3. All are inert gases as they have complete octet.
4. All of them are monatomic.