Final answer:
In atoms of Sk-69 with an atomic number of 27, there would be 27 electrons, 27 protons, and 42 neutrons.
Step-by-step explanation:
If an atom has an atomic number of 27, it means it has 27 protons in its nucleus and, if the atom is neutral, it will also have 27 electrons surrounding the nucleus. When you see Sk-69, the '69' refers to the atomic mass number, which is the sum of protons and neutrons. To find out the number of neutrons, subtract the number of protons (the atomic number) from the atomic mass number: 69 - 27 = 42.
Therefore, the atoms of Sk-69 would have:
- Electrons: 27
- Protons: 27
- Neutrons: 42
The correct answer to the student's question would then be:
a) Electrons: 27, Protons: 27, Neutrons: 42