Question

(4) TUZUII Pulciuri"
18. Which of the following configuration is assoc
with biggest jump between 2nd and 3rd 1E?
(1) 1s2 2s2 2p2 . (2) 1s2 2s2 2p6 3s1
(3) 1s2 2s2 2p6 3s2 (4) 1s2 2s2 2p1​

Answer 1

option 3

Explanation:

You're removing an electron from the 1s orbital, that's why its the highest. Those electrons are going to be tightly held by the nucleus.

Removal of electrons from a full shell is also going to require more energy, so for a there's going to be a big difference between the 1st and 2nd IEs. For b, the big difference is 2nd to 3rd, but the electrons aren't as tightly held as in c, so the answer is c.