An anion `X^(3-)` has 36 electrons and 45 neutrons. What is the mass number of the element X-

The atom of an element has 9 protons, 9 electrons and 10 neutrons. What is the mass number of the element?

The atom of an element has 9 protons, 9 electrons and 10 neutrons. What is the atomic number of the element?

An ion X^(2-) contains 10 electrons and 8 neutrons. What are the atomic number and mass number of the element X? Name the element.

An ion M^(3+) contains 10 electrons and 14 neutrons. What are the atomic number and mass number of the element M? Name the element.

An ion M^(2+) contains 10 electrons and 12 neutrons .What is the atomic number and mass number the element M? Name the element.