The correct answer is C. The step where 1H and 2H combine and the step where two 3He nuclei combine. These steps result in the formation of helium-3 (3He) and helium-4 (4He) as products.
The step/steps that have a form of helium as a product are:
C. The step where 1H and 2H combine and the step where two 3He nuclei combine.
Let's break down each answer choice to determine which steps produce helium:
A. The step where two protons combine: This step does not produce helium as a product.
B. The step where 1H and 2H combine: This step produces helium-3 (3He) as a product.
C. The step where 1H and 2H combine: This step produces helium-3 (3He) as a product. Additionally, the step where two 3He nuclei combine also produces helium-4 (4He) as a product.
D. The step where two protons combine: This step does not produce helium as a product.
The steps that have a form of helium as a product are the ones where 1H and 2H combine and where two 3He nuclei combine. These reactions produce helium-3 (3He) and helium-4 (4He) respectively.
Therefore, the correct answer is C. The step where 1H and 2H combine and the step where two 3He nuclei combine. These steps result in the formation of helium-3 (3He) and helium-4 (4He) as products.
The question probable may be:
Which step/steps has/have a form of helium as a product? group of answer choices
A .the step where two protons combine and the step where 1h and 2h combine
B. the step where 1h and 2h combine only the step where two 3he nuclei combine only
C. the step where 1h and 2h combine and the step where two 3he nuclei combine
D. the step where two protons combine only