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Explain the formation of hydrogen molecule (H_(2)) by covalent bond. |
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Answer» Solution :The ATOMIC NUMBER of hydrogen is 1, hence its electronic configuration is `{:(K),(1):}`. Thus, hydrogen has one electron in its K shell. It requires one more electron to fill the K shell. So, two hydrogen atoms share their electrons to form a molecule of hydrogen, `H_(2)`. As a result, each hydrogen atom to attain the electronic configuration of the nearest noble gas helium, which has two electrons in its K shell. Here, these two valence electrons are DEPICTED by dots or crosses is shown as follows:  The SHARED pair of electrons forms a single covalent bond between the two hydrogen atoms. A single covalent bond is also represented by a short line between the two atoms, is shown as follows : > 
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