Few elements are matched with their successive ionisation energies,Identify the elements.

Options

A. X-A noble gas ,Y-Alkali metal,Z-Alkaline earth metal
B. X-Alkali metal,Y-A noble gas,Z-Alkaline earth metal
C. X-Alkaline earth metal,Y-Alkali metal,Z-A noble gas
D. X-Alkali metal,Y-Alkaline earth metal,Z-A noble gas

Answer

A

Explanation

X has highest `IE_(1)` and `IE_(2)` hence,it is a noble gas Y has low `IE_(1)`but very high `IE_(2)` hence,it is an alkali metal.Z has low `IE_(1)`than `IE_(2)` and `IE_(2)` is even lower than `IE_(2)` of alkali metal hence,it is an alkaline earth metal.