Which is the main fuel for nuclear fusion in all stars?
nitrogen
carbon
hydrogen
helium
Hydrogen is the main fuel for nuclear fusion in all stars.
Which is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle?
helium
beryllium
iron
uranium
Iron is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle.
Which of these is a light element?
oxygen
lithium
iron
carbon
Lithium is a light element.
The main fuel for nuclear fusion in all stars is hydrogen.
The main fuel for nuclear fusion in all stars is hydrogen. Hydrogen is the most abundant element in the universe, making up about 75% of its elemental matter. To determine this, you can refer to our understanding of stellar evolution and the processes that occur inside stars.
During nuclear fusion, the intense heat and pressure within stars causes hydrogen atoms to collide and combine, forming helium. This fusion process releases an incredible amount of energy in the form of light and heat, which is what makes stars shine so brightly.
Although other elements like helium, nitrogen, and carbon play important roles in stellar fusion, hydrogen is the primary fuel for sustaining the nuclear reactions that power stars throughout their lifetimes.