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

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

.

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

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.