Question

why was niels bohrs atomic model superior to all the earlier models?
a. it proved that the atom was indivisible and therefore the smallest unit of matter.
b. it showed how the electron could orbit the nucleus without falling into it.
c. it was the first to show that the atom had no net charge.
d. it used wave behavior to explain the positions of electrons around the nucleus.

Explanation:

Earlier atomic models (like Rutherford's) couldn't explain why electrons didn't spiral into the nucleus. Bohr's model introduced fixed energy levels (quantized orbits) where electrons orbit without radiating energy, solving this key flaw. Option A refers to Dalton's outdated indivisible atom idea. Option C was already established in prior models. Option D describes later quantum mechanical models, not Bohr's.

Answer:

B. It showed how the electron could orbit the nucleus without falling into it.