Classification ...

The correct order of increasing electron affinity of the following elements is  

The elements with the lowest number that has a ground state electronic configuration of $$\left( {n - 1} \right){d^6}n{s^2}$$ is located in the :

The first ionization potential of $$Na$$ is $$5.1\ eV$$. The value of electron gain enthalpy of $${ Na }^{ + }$$ will be:

If each orbital can hold a maximum of three electrons, the number of elements in $$9 ^ { \text { th } }$$ period of periodic table (long form) are

Which of following has highest EA?

The inductive effects of the group $$ -\mathrm{CH}_{3},-\mathrm{COO}^{-},-\mathrm{Br},-\mathrm{NH}_{3}^{+} $$ respectively are:

The amount of energy released from for the process $$ X_{(g)} + e^- \rightarrow X^-_{(g)} $$ is minimum respectively for:-

For the highlighted element in its $$X^{2-}$$ form identify the CORRECT electronic configuration.

The electronic configurations of four elements are given below. Arrange these elements in the correct order of magnitude (without sign) of their electron affinity:
(i) $$2s^2 \ 2p^5$$ 
(ii) $$3s^2 \ 3p^5$$ 
(iii) $$2s^2 \ 2p^4$$ 
(iv) $$3s^2 3p^4$$ 
Select the correct answer using the codes given below:

General electronic configuration of outermost and penultimate shell is $$(n-1) s^2(n - 1)p^6(n - 1)d^x ns^2$$. If $$n = 4$$ and $$x = 5$$, then the number of protons in the nucleus will be: