When a nucleus emits a photon, what happens to its atomic number and its actual mass?

When a cell reproduces, what happens to its DNA ?

When an atomic nucleus emits gamma -rays then

An atom of an element contains 13 electrons. Its nucleus has 14 neutrons. Fid out its atomic number and approxiamte atomic mass. An isotope has atomic mass 2 units higher. What will be the number of protons, neutrons and electrons in the isotope?

If an atomic nueleus emits an electron its atomic mass will

When a nucleus undergoes radioactive decay, its new mass number is

An isotope of atomic mass 25 has 13 neutrons in its neucleus .What is its atomic number and what are the name and chemicalsymbol of the element ?

If an isotope of hydrogen has two neutrons in its atom, its atomic number and mass number will respectively be

The atomic mass of helium is 232 and its atomic number is 90. During the course of its radioactive disintegration 6 alpha and 4 beta -particles are emitted. What is the atomic and atomic number of the final atoms?