Question

What is the proper isotopic notation for a +3 ion of an atom?

Answer 1

Here's what I get.

Explanation:

The IUPAC indicates the mass, charge, and atomic number of a nuclide by subscripts and superscripts placed around the symbol:

`""_Z^A"X"^q`

where

`Z = "the atomic number"`
`A = "the mass number"`
`"X"= "the symbol for the element"`
`q color(white)(l)= "the charge on the ion"`

We write the charge as `n"+"` or `n"-"`, not as `"+"n` or `"-"n`

Thus, the symbol for a +3 ion of iron-56 is `""_26^56"Fe"^"3+"`.