Answer :
Final answer:
Without a specific Bohr model provided, we cannot identify the exact isotope. However, knowledge of atomic numbers and mass numbers allows us to deduce that Magnesium has 12 protons and Calcium has 20, which helps to calculate the number of neutrons in each corresponding isotope from the options given.
Explanation:
To determine which isotope is represented by a given Bohr model, you need to know the number of protons and neutrons in the atom. Since the question does not provide an image or description of the Bohr model, we cannot give a definitive answer. However, we can use the given options to provide information about each isotope.
Magnesium (Mg) has an atomic number of 12, which means any atom of magnesium has 12 protons. The mass number of an isotope is the sum of its protons and neutrons. Therefore, Magnesium-25 would have 13 neutrons (25 - 12 = 13), and Magnesium-13 would be impossible because it would imply having only one neutron, which does not exist for magnesium.
The atomic number of Calcium (Ca) is 20, indicating that a calcium atom has 20 protons. Thus, Calcium-25 would have 5 neutrons (25 - 20 = 5), and Calcium-40 would have 20 neutrons (40 - 20 = 20).
Understanding the atomic number and mass number is essential for identifying isotopes correctly. Without the Bohr model image, we can only provide an explanation based on the information of the atomic numbers and typical isotope naming conventions.
