Periodic Table : Group 18

Group 18 also knowns as

Group 18 exist as monoatom in nature because

• Its valence electron achieve stable electron octet arrangement

• It will not donate, accept or share electron with other elements

• It donates 1 valence electron

• It accept 1 electron into its outermost shell

Which of the following correct for members in Group 18.

• H, Ne, Kr, Ar, Rn, Xe

• He, Ne, Rn, Kr, Ar, Xe

• He, Na, Rn, K, Ar, Xe

• H, Ne, Rb, Kr, Ar, Xe

As going down Group 18, melting point

• Increase

• Decrease

Elements in Group 18 exist in nature as a

• Solid

• Liquid

• Gas

It is used in weather balloon and oxygen tank for divers.

This refers to

• Argon

• Neon

• Helium

• Kryoton

It is used in advertising board lights.

• Helium

• Neon

• Argon

• Krypton

It is used in electric bulbs and provide inert welding atmosphere.

• Helium

• Neon

• Argon

• Krypton

It is used in flashlight camera and in laser for retina treatment.

• Neon

• Argon

• Krypton

• Xenon

It is used in lighthouse lamp and anesthesia.

• Neon

• Argon

• Krypton

• Xenon