Stable isotopes, with low atomic numbers, have a N/Z ratio of 1. What does that imply?

A) The number of neutrons equals the number of protons.
B) The number of neutrons equals the number of electrons plus protons.
C) The number of electrons equals the number of protons.
D) The atomic number equals one-fifth the atomic mass.



Answer :

According to the statement, this implies that the number of neutrons is equal to the number of protons. Correct answer: letter A.

This is because the N/Z ratio (Neutron/Proton ratio) is equal to 1.

Stable Isotopes and Their Low Atomic Numbers

Stable isotopes are atoms that have the same number of protons and neutrons in their nucleus. This means that the N/Z ratio of these atoms is 1, which implies that the number of neutrons is equal to the number of protons. Stable isotopes are essential for many scientific and technological applications such as research in:

  • Nuclear physics
  • Medical imaging
  • Radiochemistry

Stable isotopes are typically found in elements with low atomic numbers. This is due to the fact that low atomic numbers indicate a low number of protons, which in turn implies fewer neutrons are needed to achieve the N/Z ratio of 1. This is why elements such as hydrogen, helium, and lithium are typically found to have more stable isotopes than other elements.

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