8. Explain the rule according to which electrons are filled in
various energy levels.
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hund rule and sad bau rule
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The rule according to which electrons are filled in various energy levels are:
1. Octet Rule : It is a rule that is followed by all the elements in the periodic table (except Hydrogen) in order to maintain stability . According to this rule the elements must have 8 electrons in their outer most shell in order to maintain stability like the noble or inert gases (except for helium the only noble gas having 2 electrons in its outer most shell.
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