Question

Each isotope has a special name derived from Latin (protium, deuterium, and tritium). What structural feature do these names refer to in the atom?

Answer 1

An isotope of any element is the same, with a variation in the neutrons of the nucleus.

The mass number change but the atomic number doesn't.

In this case, protium, deuterium, and tritium are all hydrogen isotopes.

Protium is 1H or Hydrogen-1 is without neutrons.

Deuterium is 2H  or Hydrogen-2 has one neutron.

Tritium is 3H or Hydrogen-3 has two neutrons.

Answer 2

The structural feature that special names of isotopes are given, such as protium, deuterium, and tritium, refer number of neutrons each isotope has.

Isotopes of an element have the same number of electron and protons, but have different number of neutrons.

The different number of neutrons the isotopes of an element have is what accounts for the difference in atomic mass number.

For example, the three isotopes of Hydrogen as shown in the figure attached below have the same number of electron and protons, but different mass number due to the number of neutrons each possess.

The special name given to each as, protium, deuterium, and tritium represents the structure feature that differentiates them, which is, the number of neutrons they possess.

• Protium represents a Hydrogen isotope having no neutrons.
• Deuterium represents a Hydrogen isotope having one neutrons.
• Tritium represents a Hydrogen isotope having two neutrons.

Therefore, the structural feature that special names of isotopes are given, such as protium, deuterium, and tritium, refer number of neutrons each isotope has.

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