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Which of the following best describes a key difference between the modern atomic model and the Bohr atomic model?
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9. Quantum Mechanics
Bohr Model
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A Bohr model shows a nucleus with 6 protons and 6 neutrons, surrounded by 6 electrons in two energy levels. What element does this Bohr model represent?
A
Carbon
B
Nitrogen
C
Oxygen
D
Boron
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Identify the number of protons in the nucleus, which is given as 6. The number of protons defines the atomic number (Z) of the element.
Recall that the atomic number corresponds to the element's identity on the periodic table. For example, an atomic number of 6 corresponds to the element carbon.
Note that the number of neutrons (6 in this case) does not change the element but affects the isotope of the element.
Observe the number of electrons (6) and their arrangement in energy levels. The first energy level can hold up to 2 electrons, and the second can hold up to 8. Here, 6 electrons are arranged in two energy levels, consistent with carbon's electron configuration.
Conclude that since the nucleus has 6 protons and the electron configuration matches, the Bohr model represents the element carbon.
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