Atoms | Atomic Particles

On the basis of Rutherford’s model of an atom, which sub- atomic particle is present in the nucleus of an atom?

An atom consists of the sub-atomic particles protons, electrons, and ___________

How are the subatomic particles arranged in an atom according to modern structure of the atom

The diagram given below shows the sub-atomic particles present in the nucleus of atom X. Which is the symbol for atom X ?

Out of the three sub atomic particles known which is called universal particle?