The isotope deuterium of hydrogen hasA. no neutron and one protonB. One neutron and two protonsC. One electron and two neutronD. One proton and one neutron
The correct answer is D. One proton and one neutron.
Explanation:
An isotope of an element has the same number of protons but a different number of neutrons. Hydrogen typically has one proton and no neutron (this is known as protium).
Deuterium is an isotope of hydrogen. It has:
1 proton (same as all hydrogen atoms),
1 neutron (this is what makes it an isotope),
1 electron (like all neutral hydrogen atoms).
So, deuterium consists of one proton and one neutron in its nucleus, making option D the correct choice.
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