Question

What is the ion symbol for an atom with twenty (20) protons and eighteen (18) electrons?

Answer 1

Ca²+

I agree with the one above

Answer 2

`Ca^(2+)`

Step-by-step explanation:

From the periodic table, we can see that the atom with 20 protons is Calcium (Ca).

Each proton has a +1 charge, while each electron has a -1 charge.

Since in this ion, there's 20 protons but only 18 electrons, meaning it has a net charge of +2.

Hence, the ion symbol for the required proton is

`Ca^(2+)`.

(make sure the charge symbol is behind the value.)