The electronic configuration of element `A, B`, and `C`are `[he]2s^(1),[Ne]3s^(1)`, and `[Ar]4s^(1)`, respectively. Which one of the following order is correct for the `IE_(1) ("in" kJ mol^(-1))` of `A`, B,` and `C`?

The electronic configuration of elements A, B, and Care [He] 2s^(1) , [Ne]3s^(1) and [Ar] 4s^(1) respectively. Which one of the following order is correct for the first ionisation potentials (in KJ mol^(-1) ) of A, B and C?

The electronic configuration of copper is [Ar] 4s^(1) 3d^(10) and not [Ar] 4s^(2) 3d^(9) . Justify.

Consider the following sequence of reaction: If electronic configuration of element X is [Ne]3s^(1) , then which of the following order is correct regarding given enthalpies?

Consider the following sequence of reaction: If electronic configuration of element X is [Ne]3s^(1) , then which of the following order is correct regarding given enthalpies?

Consider the following sequence of reaction : If electronic configuration of element X is [Ne]3s^(1) , then which of the following order is correct regarding given enthalpies ?

Consider the following sequence of reaction: If electronic configuration of element X is [Ne]3s^(1) , then which of the following order is incorrect regarding given enthalpies?

The electronic configuration of two elements 'A' and 'B' are 1s^(2)2s^(2)2p^(6)3s^(2)3p^(1) and 1s^(2)2s^(2)2p^(4) respectively.If the formula of compound is A_(x)B_(y) . Then the value of (x+y)/(x) is