A Bohr model shows a nucleus with 6 protons and 6 neutrons, surrounded by two electron shells: the first shell contains 2 electrons, and the second shell contains 4 electrons. Which element does this Bohr model represent?

• A. Oxygen
• B. Carbon
• C. Boron
• D. Nitrogen

Answer: (B)

Verified step by step guidance

1. Identify the number of protons in the nucleus, as the number of protons determines the element's atomic number. In this case, the nucleus has 6 protons.
2. Recall that the atomic number corresponds to the number of protons and defines the element on the periodic table. An element with 6 protons is carbon.
3. Examine the electron configuration given by the Bohr model: the first shell holds 2 electrons, and the second shell holds 4 electrons, totaling 6 electrons, which matches the number of protons for a neutral atom.
4. Confirm that the number of neutrons (6 in this case) does not affect the element identity but contributes to the isotope of the element.
5. Conclude that the Bohr model represents the element carbon, which has 6 protons and an electron configuration of 2 electrons in the first shell and 4 in the second shell.