Question

what two limitations of the plum pudding model were improved with the creation of the bohr model of the atom? the central nucleus that contains the protons and neutrons the discovery of electrons the development of the electron - cloud theory the energy levels of the electrons

Explanation:

The plum - pudding model had electrons embedded in a positive 'pudding'. The Bohr model improved on it by introducing the concept of energy levels of electrons and the development of the electron - cloud theory which described the probability of finding an electron in certain regions. The discovery of electrons was prior to the plum - pudding model, and the central nucleus was an improvement over the plum - pudding model but not the two main improvements related to the Bohr model in the context of electron behavior.

Answer:

the development of the electron cloud theory, the energy levels of the electrons