Question

Are zero group elements and $8th$ group elements same?

Answer 1

Zero group elements were discovered and introduced by William Ramsay in $1902$.Zero group is known as a group of noble gases. These gases are found in the atmosphere. They are colourless , tasteless and odourless.

Complete answer:
Group $8^{th}$ elements are also called zero group elements. They are called zero group elements as all the elements except Xenon have zero valencies and cannot combine with other elements to form compounds. The elements are Helium ($He$) , Neon ($Ne$) , Argon ($Ar$) , Krypton ($Kr$) ,Xenon ($Xe$) and Radon ($Rn$).
They are also called noble gases as they do not react with other elements or compounds.
Noble gases have zero electronegativity as they are not found in combined state.
Their electron configuration is $n{s^2}n{p^6}$.From , the electron configuration we can say that they have completely filled valence electron shells
Electron gain enthalpy of noble gases is positive whereas other elements have negative electron gain enthalpy.
Applications of zero group element:
The noble gases are used to form inert atmospheres in arc welding, to protect specimens, and to determine chemical reactions. The elements are used in lamps, krypton headlamps, neon lights and in lasers. Helium is used in balloons and to cool superconducting magnets.

Note:
Xenon can react with other elements and form several compounds like $Xe{F_{2,}}Xe{F_3},Xe{O_2},Xe{O_3}$. The elements of group 8 exhibit very high ionization enthalpies. Ionization enthalpy of noble gases decreases down the group due to the increase in their atomic size.