How do you figure out the number of protons electrons and neutrons of 7li+

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

Mg-26 and mg-24 are pair of isotopes. isotopes are defined as atoms of the same element having same atomic number but different mass number. i hope that was .