GENERAL KNOWLEDGE

Detailed explanation-1: -The main fuels used in nuclear fusion are deuterium and tritium, both heavy isotopes of hydrogen. Deuterium constitutes a tiny fraction of natural hydrogen, only 0, 0153%, and can be extracted inexpensively from seawater. Tritium can be made from lithium, which is also abundant in nature.

Detailed explanation-2: -In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.

Detailed explanation-3: -Nuclear fusion uses lighter elements, such as hydrogen and helium, which are in general more fusible; while the heavier elements, such as uranium, thorium and plutonium, are more fissionable.

Detailed explanation-4: -Lighter elements are more likely to undergo thermonuclear fusion easily, i.e. 2H. When there are two heavier nuclei, they will have more protons, and so the coulombic repulsion between the nuclei will increase. The means that more energy is needed as input in order to fuse the nuclei together.