Question

Uranium-236 is _____. created by fusion reactions an unstable isotope of uranium created from four hydrogen atoms used in the H-bomb

Answer 1

Uranium-236 is intermediate nuclei. created by fusion reactions an unstable isotope of uranium created from four hydrogen atoms used in the H-bomb.

Following is the reaction involved in above process:

$^{235}U$+ $^{1}n$ →  $^{236}U$→ $^{144}Ba$ + $^{89}Kr$ + 3 $^{1}n$ + 177 MeV

Here, 
$^{235}U$ = Fission material,
$^{1}n$ = projectile,
$^{236}U$ = intermediate nuclei,
$^{144}Ba$ and $^{89}Kr$ = Fission product

Answer 2

The asnwer in the blank would be intermediate nuclei. Uranium-236 is intermediate nuclei created by fusion reactions an unstable isotope of uranium created from four hydrogen atoms used in the H-bomb. This is use in radioactivity and  generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons.