Question

: The nucleus finally formed in fusion of protons in proton-proton cycle is that of:
(A) Heavy hydrogen
(B) Carbon
(C) Helium
(D) Lithium

Answer 1

Hint We know that the protons inside an atom's nucleus help bind the nucleus together. They also attract the negatively charged electrons, and keep them in orbit around the nucleus. The number of protons in an atom's nucleus determines which chemical element it is. A proton carries a positive charge and an electron carries a negative charge, so the atoms of elements are neutral, all the positive charges cancelling out all the negative charges. Atoms differ from one another in the number of protons, neutrons and electrons they contain.

Complete step by step answer
We know that, Overall reaction in proton-proton cycle $4_{1}^{1}\text{H}\to _{2}^{4}\text{He}+2\left( {}_{1}^{0}\text{e} \right)+\text{Q}$
Where,
$4_{1}^{1}\text{H}\to _{2}^{4}\text{He}+2\left( {}_{1}^{0}\text{e} \right)+\text{Q}$is a Proton,
$4_{1}^{1}\text{H}\to _{2}^{4}\text{He}+2\left( {}_{1}^{0}\text{e} \right)+\text{Q}$ is a Helium nucleus,
$4_{1}^{1}\text{H}\to _{2}^{4}\text{He}+2\left( {}_{1}^{0}\text{e} \right)+\text{Q}$is a Positron, and Q is denoted as energy.
So, finally the Helium nucleus is formed.

Therefore, the correct answer is Option C.

Note We know that the nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus. The atomic nucleus is a very dense region in the center of the atom. The nuclear force is a natural force that holds protons and neutrons together. This force keeps the subatomic particles nice and tight.