How many protons, electrons, and neutrons are in I - and Li + ?

For I-

protons = atomic no. = 53

neutrons = atomic mass - atomic number = (127 - 53) = 74

Since it has a negative positive charge, to find the no. of electrons, we need to add 1 to the number of protons, i. e.

electrons = (53 + 1) = 54

And,

For, Li+

protons = atomic no. = 3

neutrons = atomic mass - atomic number = (7 - 3) = 4

Since it has a positive charge, to find the no. of electrons, we need to subtract 1 form the number of protons, i. e.

electrons = (3 - 1) = 2