Explain why `._(1)^(3)H and ._(2)^(3)He` are not considered isotopes

._(1)^(3)H and ._(2)^(4)He are:

The two nuclides ._1^3H and ._2^4He are known as

Explain why mule is not considered as species ?

Explain why , hydrogen and oxygen are considered elements whereas water is not considered an element .

Consider the D - T reaction (deuterium - tritium fusion) ._(1)^(2)H+ ._(1)^(3)H to ._(2)^(4)He + n Calculate the energy released in MeV in this reaction from the data : m(._(1)^(2)H)=2.014102 u m(._(1)^(3)H)=3.016049 u