What is the difference between the nuclei of the 3 / 1X and 3 / 2Y isotopes? What chemical elements do they refer to?

What is the difference between the nuclei of the 3 / 1X and 3 / 2Y isotopes? What chemical elements do they refer to? Are their chemical properties the same?

These nuclei differ in the number of protons and neutrons. The first nucleus has 1 proton, 2 neutrons, the second has 2 protons and 1 neutron. The first nucleus is an isotope of hydrogen, the second is an isotope of helium. Their chemical properties are different.

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