[amp_mcq option1=”1 proton only” option2=”1 proton + 2 neutron” option3=”1 neutron only” option4=”1 electron only” correct=”option1″]
The correct answer is A. 1 proton only.
A hydrogen atom consists of a single proton in the nucleus and a single electron orbiting the nucleus. The proton has a positive charge, the electron has a negative charge, and the nucleus is held together by the strong nuclear force.
Option B is incorrect because a hydrogen atom has only one proton in its nucleus, not two protons.
Option C is incorrect because a hydrogen atom has no neutrons in its nucleus, not one neutron.
Option D is incorrect because a hydrogen atom has one electron in its orbit, not one electron in its nucleus.