Chemistry - Nuclear fission and fusion
Nuclear fission and fusion
Atoms are rearranged in chemical reactions, but different atoms are not
formed. The formation of new atoms however is the key to energy sources
that are both questioned and taken for granted at the start of the third
Nuclear reactions involve changes in the nuclei of atoms. During nuclear
reactions, different atoms (elements) from those present at the start of
the reaction are formed.
Nuclear fission is a nuclear reaction in which a large nucleus is
broken down (split) into smaller nuclei.
Nuclear fusion  is a nuclear reaction in which two or more small
nuclei combine to form a larger nucleus.
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