Answer:
Explanation:The lewis structure of ammonia shows that nitrogen is surrounded by four electron pairs.In term of electron repulsions model,the tetrahedral structure gives maximum separation .There is one lone pair electrons on nitrogen which replels the bonding pairs with the result that angles is reduced from 109 to 107.In term of hybrid orbital.model ,nitrogen utilizes is three of four sp3 orbitals to form sigma bond with three hydrogen atoms having one non bonding orbital on nitrogen.
Answer:
Polar, Trigonal Pyramidal, Polar
Explanation:
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Blank 1: polar
The difference in electronegativity between N and H causes electrons to preferentially orbit N, making the bond polar.
Blank 2: trigonal pyramidal
There are four “things” attached to N - 3 H’s and 1 lone pair of electrons. The four things together are arranged into a tetrahedral formation. However, the lone pairs don’t actually contribute to the shape of the molecule per se; it’s only the actual atoms that do. The lone pair creates a bit of repulsion that pushes the 3 H’s down, creating a trigonal pyramidal shape (as opposed to a trigonal planar one).
Blank 3: polar
The molecule as a whole is also polar because the “things” around it, though arranged in a tetrahedral pattern, are not all the same. The side of the molecule with the lone pair is slightly negative, while the side with the 3 H’s is slightly positive due to the differences in electronegativity described above.
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