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For the ground state, the electron in th...

For the ground state, the electron in the H-atom has an angular momentum=h, according to the simple Bohr model. Angular momentum is a vector and hence there will be infinitely many orbits with the vector pointing in all possibly directions. Actuality, this is not true.

A

because Bohr model gives incorrect values of angular momentum.

B

because only one of these would have a minimum energy.

C

angular momentum must be in the direction of spin of electrons.

D

because electrons go around only in horizontal orbits.

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