Which of the following electronic configurations has the lowest value of ionisation energy? Explain.
a. `1s^(2) 2s^(2)2p^(6)`
b. `1s^(2) 2s^(2)2p^(5)`
c. `1s^(2) 2s^(2)2p^(6) 3s^(1)`

Q .Which of the following electron configurations is correct for nickel (atomic number "28" )? a) 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)3d^(9) (b) 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(8) (c) 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(0)3d^(10)

The electronic configuration for the following neutral atoms are given for use in question. (a) 1s^(2) 2s^(2) 2p^(6) 3s^(2) (b) 1s^(2) 2s^(2) 2p^(6) 3s^1 (c ) 1s^(2) 2s^(2) 2p^(4) (d) 1s^(2) 2s^(2) 2p^(5) (e) 1s^(2) 2s^(2) 2p^(6) Which of the electronic configurations given above would you expect to have the lowest ionization enthalpy?

The electronic configuration for the following neutral atoms are given for use in question. (a) 1s^(2) 2s^(2) 2p^(6) 3s^(2) (b) 1s^(2) 2s^(2) 2p^(6) 3s^1 (c ) 1s^(2) 2s^(2) 2p^(4) (d) 1s^(2) 2s^(2) 2p^(5) (e) 1s^(2) 2s^(2) 2p^(6) Which of the electronic configuration given above would you expect for the noble gas?

The electronic configuration for the following neutral atoms are given for use in question. (a) 1s^(2) 2s^(2) 2p^(6) 3s^(2) (b) 1s^(2) 2s^(2) 2p^(6) 3s^1 (c ) 1s^(2) 2s^(2) 2p^(4) (d) 1s^(2) 2s^(2) 2p^(5) (e) 1s^(2) 2s^(2) 2p^(6) List the above configurations in order of increasing ionization enthalpy.

Elements with their electronic configurations are given below: Answer the following questions: (I) 1s^(2) 2s^2 (II) 1s^(2) 2s^(2) 2p^(6) (III) 1s^(2) 2s^(2) 2p^(6) 3s^(2) (IV) 1s^(2) 2s^(2) 2p^(3) (V) 1s^(2) 2s^(2) 2p^(5) The element with lowest value of electron affinity is:

Elements with their electronic configurations are given below: Answer the following questions: (I) 1s^(2) 2s^2 (II) 1s^(2) 2s^(2) 2p^(6) (III) 1s^(2) 2s^(2) 2p^(6) 3s^(2) (IV) 1s^(2) 2s^(2) 2p^(3) (V) 1s^(2) 2s^(2) 2p^(5) The element with highest I.E. is: