Whose electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5?

Answer 1

Iodine. Add up all the superscript numbers to get 53, which is iodine's atomic number. Or, just look at the last term, 5p5. That's the element in period 5 that's one short of noble gas configuration.

Answer 2

atomic number is 2+2+6+2+6+2+10+5 = 35

35 is Bromine . its electronic configuration is 2,8,18,7

Answer 3

This electron configuration belongs to the element iodine (I), which has 53 electrons.

Answer 4

Palladium