Even Nitrogen, which needs 8 electrons in the valence shell has all 8 of them, thereby forming a full exterior shell. Referring to the octet rule, hydrogen needs only 2 valence electrons, which it already has. Since the NH4+ atom has 8 valence electrons, our arrangement will be according to 2,4,6, and 8. ![]() Keeping Nitrogen in the center, and considering Hydrogen’s position on the outside, we can place the 4 hydrogen atoms surrounding the single nitrogen atom. If we total out the number of electrons, it will be (1×4) + (5×1) – 1 = 4 + 5 – 1 = 8. The plus sign denotes the absence of 1 electron therefore, it is minus one. Nitrogen’s valence electron count, however, is 5, owing to its position in the 5th group of the periodic table. NH4+ has 4 hydrogen atoms, therefore, there are 4 hydrogen electrons. If we look towards the periodic table, we will find Hydrogen in group 1. ![]() ![]() While understanding the concept of Lewis Structure, it is essential to keep in mind that the idea is neither to explain the molecular geometry nor of the formation of bonds nor of the electron sharing between two atoms of one or multiple elements.Īs mentioned earlier, NH4+ is made up of Nitrogen and Hydrogen. The end goal is to identify a configuration with the best electron arrangement such that the formal charges and the octet rule are upheld. In the Lewis Structure, electrons are depicted as dots.Ī bond between two electrons is represented by a line marked by a dot at both ends, involving the participating electrons. Lewis Structure is a simplified arrangement and presentation of the electrons present in the valence shell of a molecule.Ī Lewis Structure is a depiction of the arrangement of electrons in the standalone atoms of an element.
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