What was the problem with Rutherford's model?
a.
It described a nucleus.
c.
It could not explain the chemical properties of elements.
b.
It did not include electrons
d.
It described quantums.

Question

What was the problem with Rutherford's model?
a.
It described a nucleus.	
c.
It could not explain the chemical properties of elements.
b.
It did not include electrons	
d.
It described quantums.

habbababba1 · Answer

The main problem with Rutherford's model was that he could not explain why negatively charged electrons remain in orbit, when they should instantly fall into the positively charged nucleus. This problem would be solved by Danish physicist Niels Bohr in 1913.

habbababba1 · Answer

@druss

mww · Answer

@habbababba1
Not quite. Niels Bohr came up with a postulate that "although electrons are constantly accelerating, an electron moving in such an allowed orbit (quantum numbers) does not radiate electromagnetic energy. Thus, its total energy E remains constant."

However this was only an a priori assumption but he had no basis for this. 
The problem was definitively solved in 1923 when De Broglie considered electrons to be waves and if there is an integer number of standing wavelengths around the circumference of the orbit, then this would enable the electrons to orbit without needing to radiate energy and thus remain in stable orbit.