Answer:
[tex]Ca^{++}[/tex]
Explanation:
Calcium atom has atomic number 20 and atomic mass number 40. The number of electrons and protons in the calcium atom are 20. So, the charge on the Calcium atom is neutral. When Calcium atom loses an two electron the number of electrons becomes 18 but number of protons remains the same 20. So, the total charge on the Calcium atom is - 18 + 20= +2
Thus, the new symbol for Calcium atom after losing 2 electrons is [tex]Ca^{++}[/tex]
