A nucleus contains no electrons but can emit them. How ?

alpha - particles scattering experiment confirms i) Nucleus is positively charged. ii) Nucleus contains electrons. iii) Electrons revolve around the nucleus. iv) Most of the space inside the atom is empty.

The nucleus of an atom contains

The nucleus of an atom contains

The outermost shell of a representative element contains x electrons and penultimate shell contains Y electrons. The number of valence electrons could be………

P: Kernel is the nucleus and all other electrons in the atom except the outer most shell electrons. Q Valency is the outermost shell.

Geeta got a doubt, ''Why does atomic nucleus contain proton and neutrons? Why can't electrons and neutrons be in it.'' Can you help to clarify her doubt? Explain.

The ratio of the radius of the first Bohr orbit for the electron orbiting the hydrogen nucleus to that of the electron orbiting the deuterium nucleus (mass nearly twice that of the hydrogen nucleus) is approximately