Question

isotopes have the same number of protons (because they are the same element) but different numbers of neutrons, giving them different mass numbers. 13. the atoms on either side are... isotopes same atom, not isotopes different element 14. the atoms on either side are... isotopes same atom, not isotopes different element

Explanation:

• For question 13:
• Isotopes are atoms of the same element with different mass numbers (due to different neutron counts).
• In the second row (Carbon - 12 and \(^{12}_{6}C\)), they are the same atom (same element, same mass number).
• For question 14:
• Atoms with different proton numbers are different elements.
• The first atom has 13 protons (Aluminum, if we consider the proton - number - element relationship), and the second has 14 protons (Silicon).

Answer:

1. Same atom, not isotopes
2. Different element