![]() The main group (group 1- 17) elements tend to attain the electronic configuration of the outermost shell of noble gas elements. Let us now understand the next important concept of Lewis Structure: We have put the valence dot structures and made a sketch of the NF3 molecule. Let us sketch a probable Lewis Structure for Nitrogen Trifluoride. In Lewis Structure, we denote valence electrons by dot notations. Electropositive atoms, on the other hand, are more prone to share and aid in bond formation. This is because electronegative atoms are usually reluctant to share electrons. Nitrogen is more electropositive than fluorine and we will keep it in the center. The total number of valence electrons in a NF3 molecule = 5 + 7*3 = 26. Nitrogen has 5 and fluorine has seven valence electrons. Nitrogen belongs to group 15 and fluorine, being a halogen, belongs to group 17. ![]() The combining or the binding power or capacity is termed as Valency.Īs we can see, the above diagram gives us the Periodic table. ![]() The electrons that are present in the outermost shell of an atomic nucleus are known as valence electrons. In Lewis Structure, we try to find a suitable pictorial representation of a molecule to have an idea of the chemical bonding occurring inside the molecular structure.īefore we proceed, we need to learn about a very important concept: Valence Electrons. Nitrogen trifluoride is a chemical molecule having one atom of nitrogen and three atoms of fluorine.
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