What is the process of electrons combining with nuclei?a.Nucleosynthesisb.Recombinationc.Molecular cloudsd.Dark agese.All of the abovef.None of the above

To find the correct answer to the question "What is the process of electrons combining with nuclei?", let's analyze the given options:

1. Nucleosynthesis: This refers to the process by which elements are formed from nuclear reactions, such as in stars, but it typically involves fusion rather than just the combination of electrons with nuclei.

2. Recombination: This is the process in which free electrons combine with protons (nuclei of hydrogen) to form neutral hydrogen atoms. This took place after the Big Bang when the universe cooled enough for electrons to combine with protons.

3. Molecular Clouds: These are regions in space where gas and dust gather, often playing a role in star formation but are not directly about electrons combining with nuclei.

4. Dark Ages: This term refers to a period in the early universe before stars formed, not specifically related to the process of electrons and nuclei combining.

5. All of the above: This suggests that all previous options are correct, which isn't the case as only one fits the definition of the process described.

6. None of the above: This would mean that none of the options are correct, which is also not the case since "recombination" is a valid answer.

Final Answer

The correct answer is b. Recombination.