Question

what is meant by octect how it is related to elements​

Answer 1

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The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electron configuration as a noble gas.


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Answer 2

The octet is a rule that says, atoms of main-group elements easily bond in a way that each atom has eight electrons in its valence shell, and thus, gives it the same electronic configuration (like noble gas). The rule is applicable to carbon, nitrogen, oxygen, and the halogens, but also to metals such as sodium or magnesium.