AQA GCSE Niels Bohr changing the nuclear model

AQA GCSE Niels Bohr changing the Nuclear Model

Niels Bohr and the Nuclear ModelNiels bohr photo

Niels Bohr published a series of papers on the model of the atom in 1913. This changed the nuclear model of the atom. 

Niels Bohr proposed that:

Electrons orbit the nucleus at specific distances

Below is an image of Niels Bohr proposed model of the atom:

Energy levels

In Niels Bohr model, the electrons are in energy levels  at specific distances from the nucleus. 

The first  energy level can hold up to two electrons.

The second and third  energy level can hold up to 8 electrons

How did Niels Bohr come up with this idea?

Niels Bohr carried out experiments and the observations of these experiments matched his theoretical calculations. 

You do not need any details of these experiments for your course, but if you wish you can google them.

Nucleus

At the time the structure of the nucleus was unknown, so it was treated as a positively charged sphere, its exact structure was discovered later. 

Practice Questions

1. How is the Niels Bohr nuclear model of the atom different to the Rutherford model of the atom?

2. How did Niels Bohr know about the energy levels?

3. What did Niels Bohr propose about the nuclear model?

Accordion Content
Accordion Content
Accordion Content
Accordion Content