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No. Stars are only in the main sequence when they are fusing hydrogen.

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Q: Are stars in the main sequence when nuclear fusion of any element is taking place?
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What is the site of nuclear fusion on the sun?

If you are asking where does solar nuclear fusion take place, then that would be at the core of stars.


Nuclear reaction taking place inside sun is called?

Nuclear fusion; hydrogen into helium.


What type of fuel does a protostar burn?

A protostar does not burn fuel as it is still taking part in nuclear fusion. It is, however, preparing to become a main sequence star, and will then burn mostly hydrogen at that stage.


What is the main type of fusion taking place in the sun?

Nuclear fusion of hydrogen isotopes take place to form helium.


What is the difference between the nuclear reactions taking place in the sun and the nuclear reactions taking place in a nuclear reactor?

The sun's nuclear reactions are fusion reactions at extremely high temperatures and pressures, while the nuclear reactor's nuclear reactions are fission reactions at typical temperatures and pressures for earth.


What is the process in which the nuclei of two atoms combine to form a larger nucleus?

It is called fusion. It is the process taking place on our sun, as two hydrogen atoms fuse together to form a helium atom and give off a small amount of energy while losing some mass.


What are the differences of fission and fusion?

Fission is the process of taking a heavy element and splitting it into two or more smaller elements. Whereas fusion is the process of forming a heavier element by fusing two or more smaller elements.


What element is the end product of the nuclear reactions taking place in the Sun's core?

Helium


Who originated the element sodium?

Sodium originated in the nuclear reactions taking place inside stars.


The sun's own energy comes from solar energy?

Yes, and it is formed from the process called nuclear fusion. The sun's own energy comes from nuclear reactions taking place in the sun's core.


What part of the sun is energy produced in?

Nuclear fusion is taking place in the Sun's core that makes the solar energy. Hope this helped! :)


When are changes of energy to mass and mass to energy observable?

-- In the cores of stars, where nuclear fusion reactions are taking place. -- Inside the casing of a nuclear weapon at the moment of detonation. -- In the fuel rods in the core of a nuclear power generating station. -- At the point of collision in the experimental target area in a particle accelerator.