What is the net loss of hydrogen for each full cycle of the proton proton chain? Explain

In a full cycle of proton proton chain reaction, a helium nucleus is formed by the four hydrogen nuclei and a huge amount of energy nearly 0.7 percent of the original mass is lost.

Explanation: The Sun gets its energy when hydrogen nuclei are fused together to form helium nuclei within the solar core. This hydrogen burning is described by a sequence of nuclear fusion reactions called the proton-proton chain. Overall, this chain successively fuses four protons together to make one helium nucleus.

it means there are 3 atoms of oxygen

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?