What is ground state?

Energy of an atom at its ground state is _________ .

The mass of a neutral carbon atom in ground state is

A hydrogen atom in ground state obsebe a photon of ultraviolet radition of wavelength 50 nm Assuming that the entire photon energy is taken up by the electron with what kinetic energy will the up by the electron with what kinetic energy will the electron be ejected?

Hydrogen atom in ground state is excited by a monochromatic radiation of lambda=975 Å . Number of spectral lines in the resulting spectrum emitted will be

A hydrogen atom in ground state absorbs 10.2eV of energy .The orbital angular momentum of the electron is increases by

The radius of the first emitted Bohr orbit, for the electron, in a hydrogen atom equals 0.51 Å and its ground state energy equals -13.6 eV. If the electron in the hydrogen atom is replaced by muon (mu^-) [charge same as electron and mass 207 m_e ], the first Bohr radius and ground state energy will be

According to Maxwell's theory of electrodynamics, an electron going in a circle should emit radiation of frequency equal to the frequency of revolution what should be the wavelength of the radiation emitted by a hydrogen atom in ground state if this rule is followed?