In each of the following sets of elements, which element would be expected to have the highest ionization energy? a) Rb, K, Li
b) Ra, Sr, Ca
c) F, Br, Cl
d) Te, Si, S

d) C,O,F

Explanation:

because if you add up the atomic no.s  (which is directly the size of the element)of each set d) is smallest.

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

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