How is the modern model of an atom different than the Bohr atomic model?

Answer 1

Bohr's model views the atom as a miniature solar system, with electrons representing planets and the nucleus representing the sun. According to this model, the position of each electron can be accurately determined at any point in time. In the modern model, the orbiting electrons are like the blades of a rotating fan, which move so quickly that their position at any given time cannot be determined with certainty.

Answer 2

Niel Bohr's model states that electrons orbit in fixed circular orbits around the nucleus. They can jump between orbits, depending on the amount of energy they have. (higher orbits needing more energy)

The current atomic model is the quantum mechanics model. Instead of having atoms orbit in only circles, each atom has four different variables to describe it's orbit.

N is how big the orbit is. (Same as the Bohr model)

L is the angular momentum. It describes the shape of the orbit.

Ml is the magnetic quantum number. It is how the shape of the orbit is rotated.

Ms is the spin quantum number. It shows the spin of the electron.

See Chemistry for dummies for a better explanation.

Answer 3

The modern atomic model is based on quantum mechanics, clouds of electrons, wave functions.