In a hydrogen fusion reaction two lighter hydrogen nuclei merge to form a heavier more stable helium nucleus. the energy that is released in a hydrogen fusion reaction is

is very large and it provides the needed temperature for another set of fusion

Explanation:

Nuclear fusion is the combination of two atomic nuclei into larger ones.

One of such is used in making hydrogen bonds.

In nuclei fusion,

²₁ H + ²₁ H → ⁴₂He + energy

This is an example of nuclear fusion.

The energy helps to further the fusion process and a chain reaction occurs and a massive amount of energy is released.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

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