Question

who hade well defined orbits of atom
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Answer 1

Answer:

Niels Bohr

ʜᴇ ʜᴀᴠᴇ ᴍᴀᴅᴇ ɪ ʜᴏᴘᴇ ᴛʜɪs ɪs ʜʟᴇᴘғᴜʟ

Answer 2

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In 1913, Rutherford's post-doctoral student, Niels Bohr, proposed a new model of the atom, wherein electrons orbited the nucleus with classical periods, but were only permitted to have discrete values of angular momentum, quantized in units $\frac{h}{2π}$.❤