Which is a beta-emitting radioactive isotope of hydrogen that has one proton and two neutrons in its nucleus, making it three times as heavy as a hydrogen nucleus and one and a half times heavier than deuterium?
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Correct answer: A
Explanation
The correcrt answer is option 1 i.e. Tritium
- Tritium is the most stable radioactive isotope, with a half-life of 12.32 years.
- It is a beta emitting radioactive isotope of hydrogen.
- Its nucleus contains one proton and two neutrons, making it three times as heavy as the hydrogen nucleus (with its one proton) and one and a half times as massive as deuterium (which has one proton and only one neutron).
Deuterium:
- It is one of the two stable isotopes of hydrogen.
- The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron.
Radium:
- The natural abundance of deuterium in Earth's oceans is about one atom to 6420 hydrogen.
- It is a chemical element.
- It is the sixth element in Group 2 of the periodic table, also known as the alkaline earth metals.
Protium (isotope) or Hydrogen - 1:
- It is the most common isotope of the element hydrogen, which has one proton, one electron, and no neutrons.