Question

which is the second step of the fusion process?
o $_1^1$h + $_1^1$h → $_1^2$h + e⁺ + ν + energy
o 6($_1^1$h) + 2($_ { - 1}^0$e) → $_2^4$he + 2($_1^1$h) + energy + 2ν
o $_1^2$h + $_1^1$h → $_2^3$he + energy
o $_2^3$he + $_2^3$he → $_2^4$he + $_1^1$h + $_1^1$h + energy

Explanation:

In the proton - proton chain (a common fusion process in stars), the first step is two hydrogen - 1 nuclei fusing to form deuterium ($^2_1H$), a positron ($e^+$), and a neutrino ($
u$). The second step is deuterium fusing with another hydrogen - 1 nucleus to form helium - 3 ($^3_2He$). The equation for this second step is $^2_1H+^1_1H
ightarrow^3_2He + energy$.

Answer:

$^2_1H+^1_1H
ightarrow^3_2He + energy$ (the third option)