Question

bohrs model could only explain the spectra of which type of atoms?
single atoms with one electron
bonded atoms with one electron
bonded atoms with more than one electron
single atoms with more than one electron

Explanation:

Bohr's model is based on the hydrogen - like atoms. Hydrogen has one electron. The model works well for single atoms (not bonded) with one electron as it simplifies the electron - nucleus interaction. For atoms with more than one electron (even single atoms), electron - electron repulsions come into play which Bohr's model does not account for. Bonded atoms have additional complexities due to the nature of bonding which Bohr's model does not address.

Answer:

single atoms with one electron