Question
(b) Niels Bohr adapted the nuclear model. Describe the change that Bohr made to the nuclear model. __
Answer
4.7
(214 Votes)
Bennett
Professional · Tutor for 6 years
Answer
Niels Bohr introduced to the nuclear model the theory of quantum mechanics. He proposed that an electron has certain specific amounts of energy, allowing bitcoins to leap among energy levels based upon the specific energy amounts they receive or give up. When electrons absorb energy under interaction, jump to a higher energy level, after return emit radiation. This became the basis for the contemporary atomic models and quantum theory. This is considered as Bohr's significant change to the nuclear Model.
Explanation
## Step1: Understanding the nuclear modelThe nuclear model, proposed by Rutherford, describes an atom having a small, dense, positively charged center, called the nucleus, with negatively charged electrons revolving around it in circular orbits. It further states that most of the atom’s mass is concentrated in this tiny nucleus and the atom is mostly empty space being traced by the electrons on their orbits.## Step2: Niels Bohr ChangesNiels Bohr proposed changes to the nuclear model to address its inability to explain the stability of atoms, and the special spectral lines emitted by hydrogen gas. The modifications suggested by Bohr are introduced as Quantization Principle which according to this, the electrons in the atoms could only have certain specific amounts of energy. Thus, electrons could not spirally crash into the nucleus, but they instead leaped "quantum leap" across various energy levels- orbits based exclusively on precise and discrete quantities of energy. ## Step3: Differences between the nuclear and Bohr atom modelsThe main difference then lies in the difference in nature of the available orbits for the electrons. Rutherford's model suggested that electons could move in any orbit around the nucleus as long as it did not spiral into it. On the other hand Bohr's model states that the electrons move in certain designated orbits, also known as energy levels.