Question

1. the atoms on either side are...

isotopes
same atom, not isotopes
different element

1. the atoms on either side are...

isotopes
same atom, not isotopes
different element

Explanation:

• For question 15:
• Isotopes are atoms of the same element with different mass numbers (due to different numbers of neutrons).
• \(^{12}_{6}C\) and \(^{13}_{6}C\) have the same atomic number (6, so they are the same element - carbon) but different mass numbers (12 and 13).
• Carbon - 12 (\(^{12}_{6}C\)) and \(^{12}_{6}C\) are the same atom (not isotopes as there is no difference in mass number).
• Argon - 40 and Argon - 41 are isotopes (same element - argon, different mass numbers).
• \(^{11}_{5}B\) (boron - 11) and boron - 10 are isotopes (same element - boron, different mass numbers).
• For question 16:
• An atom with 13 protons is aluminum (\(Al\)) and an atom with 14 protons is silicon (\(Si\)).
• Since they have different numbers of protons, they are different elements.

Answer:

1. Isotopes
2. Different element