One isotope of a metallic element has the mass number 65 and 35 neutrons in the nucleus. the cation derived from the isotope has 28 electrons.

a. what is the symbol for the element?

b. what is the charge?

The mass number of an isotope is the sum of the numbers of protons and the numbers of the neutron. Given that the mass number is 65 and the number of neutrons is 35, the number of protons is 30. The atom is then Zinc (Zn). The charge is equal to + 2, as it lacks 2 more electrons.