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Write the symbol and electronic configur...

Write the symbol and electronic configuration of element with atomic number 3.

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Boron is trivalent in nature. Each boron atom forms three covalent bonds with three hydrogen atoms. Therefore, no electron is left in boron atom for sharing with the other boron atom. Thus, mutual sharing will not take place between the two boron atoms. Whereas in the structure of ethane, an electron pair is present. The mutual sharing takes place between C-C and C-H. Hence, diborane cannot form structure like ethane.
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