the _ of an element is the average mass of an element naturally occurring atom, or isotopes,taking into account the _ of each is
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The substance whose Lewis structure shows three covalent bonds is Nitrogen gas molecule.
<h3>What is Lewis structure?</h3>Lewis structure is a dot structure which gives idea about the number of valence electrons that are involved in the bonding within the molecule.
Lewis dot structure of nitrogen gas will be expressed as in the attached image, where between two nitrogen atoms triple bond is present. That triple bond is formed by the sharing of electrons and known as covalent bonds.
Hence in nitrogen gas molecule three covalent bonds is present.
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