Question

The group contains only gaseous elements is

Answer 1

Answer:

nobal gasses, any of the seven chemical,

elements that make up group 18

Answer 2

Answer:

The group contains only gaseous elements is group 18.

Explanation:

• Elements of group 18 are known as inert or Noble gases. Because they do not participate on chemical reaction. That's why they are being called inert gases.

• The elements in group 18 are He, Ne, Ar, Kr, Xe and Rn. The group 18 is present in the long modern periodic table in the right hand side.

• All the noble gases except Helium have completely filled outermost shell. The electronic configuration is ns²np⁶ with complete octet. Helium had 1s² configuration.
• As all the noble gases have complete octet, they have no tendency to gain or lose the electrons. So they do not participate in chemical reaction because of their stable configuration.
• The atomicity of all noble gases is one. All noble gases are monoatomic.