Question

Cite two important quantum-mechanical concepts associated with the Bohr model of the atom.(b) Cite two important additional refinements that resulted from the wave-mechanical atomic model.

Answer 1

Answer A: The two important quantum-mechanical concepts associated with the Bohr model includes:

1) that electrons are particles moving in separate or individual orbitals.

2) electron energy is quantised into shells.

Step-by-step explanation:

Neil- Bohr model structure of atoms shows that electrons of atoms appears in orbits of different energy revolving around the nucleus. He also described how these electrons can have one energy level at a time, that is, the electrons are quantised in shells.

Answer B: the two important refinements resulting from the wave mechanical atomic model includes:

1) that electron position is described in terms of a probability distribution.

2) electron energy is quantised into both shells and subshell.a and each electron is characterised by four quantum numbers.

Explanation: Wave mechanical atomic model was created by the Physicist Erwin Schrödinger. He refined the work of Bohr by using mathematical equations to describe the likelihood of finding an electron in a certain position. Rather than defining the exact path of an electron like in Bohr method, he predicted the odds of the location of the electrons.

Answer 2

Answer: Bohr postulated that electronic energy levels are quantized. Secondly, a photon of light of a particular frequency is emitted when electrons move from a higher to a lower energy levels.

Step-by-step explanation:

The Bohr model of the atom is the immediate predecessor of the wave mechanical model of the atom. The wave mechanical model refined the Bohr's model by treating the electron as a wave having a wave function psi. The wave function describes the identity of the electron. From Heisenberg uncertainty principle, the position of a particle cannot be accurately and precisely measured. Hence the wave mechanical model added that electrons are not localized in orbits according to Bohr's model but the integral of psi squared dx gives the probability of finding the electron within a given space.