Question

carbon - 14 is an example of an
a isotope.
b isobar.
c allele.
d alloy.

Explanation:

• Isotope: Atoms of the same element (same number of protons) with different numbers of neutrons. Carbon - 14 has 6 protons (like carbon - 12 and carbon - 13) but a different number of neutrons.
• Isobar: Atoms of different elements with the same mass number. Carbon - 14 is a carbon atom, not a different element.
• Allele: A variant form of a gene. This is a biological term, not related to atomic structure.
• Alloy: A mixture of metals or a metal and another element. This is a materials science term, not related to atomic structure.

Answer:

A. isotope