What are atomic number and mass numbers ?

What is atomic number and mass number?

The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number ?

The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number?

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.

What is the atomic number and mass number of proton and tritium.

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

What is the atomic number and mass number of daughter nucleaus when the nucleus _48 cd^115 undergoes two successive beta - decays?