Nuclear fission involves the splitting of heavy atomic nuclei into lighter nuclei. It occurs through induced fission where a neutron is absorbed, causing the nucleus to split into fission products along with more neutrons. Nuclear fusion combines two atomic nuclei into a heavier one and releases energy in the process. It is the process that powers stars like our Sun, which generates energy through the fusion of hydrogen into helium in its core.

1. NUCLEAR FISSION AND FUSION

2. Content
1). Nuclear Fission
2). Nuclear Fussion

3. Nuclear Fission
 In nuclear physics and nuclear chemistry, nuclear fission is
either a nuclear reaction or a radioactive decay process in
which the nucleus of an atom splits into smaller parts
(lighter nuclei), often producing free neutrons and photons
(in the form of gamma rays), and releasing a very large
amount of energy, even by the energetic standards of
radioactive decay. The two nuclei produced are most often
of comparable but slightly different sizes, typically with a
mass ratio of products of about 3 to 2, for common fissile
isotopes. Most fissions are binary fissions (producing two
charged fragments), but occasionally (2 to 4 times per 1000
events), three positively charged fragments are produced,
in a ternary fission. The smallest of these fragments in
ternary processes ranges in size from a proton to an argon
nucleus.

4. An inducted fission reaction
 An induced fission reaction. A
neutron is absorbed by a
uranium-235 nucleus, turning it
briefly into an excited uranium-
236 nucleus, with the excitation
energy provided by the kinetic
energy of the neutron plus the
forces that bind the neutron.
The uranium-236, in turn, splits
into fast-moving lighter
elements (fission products) and
releases three free neutrons. At
the same time, one or more
"prompt gamma rays" (not
shown) are produced, as well.

5. Nuclear Fusion
 In nuclear physics, nuclear fusion is a nuclear
reaction in which two or more atomic nuclei
join together, or "fuse", to form a single
heavier nucleus. During this process, matter
is not conserved because some of the mass of
the fusing nuclei is converted to energy which
is released. Fusion is the process that powers
active stars.

6. The Sun
 The Sun is a main-
sequence star, and thus
generates its energy by
nuclear fusion of
hydrogen nuclei into
helium. In its core, the
Sun fuses 620 million
metric tons of
hydrogen each second.

7. BY:-
Neelabh
INDIA