Question

what is the hybridization of Be atom in solid and gaseous BeH2

Answer 1

Atomic spectra is the spectrum of radiation absorbed or released due to transitions between energy levels in an atom. Atomic spectra is based on the fact that an electron can move between shells. When an atom absorb energy, it get excited from ground state to excited state, the energy absorbed by the atom form absorption spectra while energy released by the atom on returning to ground state form emission spectra.