Nuclear Processes — Test

Question 9 • Physics in the Universe

What is the first step of the hydrogen fusion process?

Answer

2 cubed He plus 2 cubed He rightarrow 2 to the 4th power He plus 2 times open paren 1 to the 1th power cap h close paren plus energy

6 times open paren 1 to the 1th power cap h close paren plus 2 times open paren negative 1 to the 0 power e close paren rightarrow 2 to the 4th power He plus 2 times open paren 1 to the 1th power cap h close paren plus energy plus 2 v

1 squared cap h plus 1 to the 1th power cap h rightarrow 2 cubed cap h e plus energy

1 to the 1th power cap h plus 1 to the 1th power cap h rightarrow 1 squared cap h plus e raised to the plus plus v power plus energy

Explanation

The first step in the proton-proton chain is for two hydrogen nuclei (protons) to combine, forming deuterium. This reaction also releases a positron, a neutrino, and energy, which matches choice B. The other reactions occur later in the chain or describe the overall process.

AI-written and checked against the verified answer.

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