Adv ance Study Assignment: The Geometrical Structure of Molecules You are asked

Question

Adv ance Study Assignment: The Geometrical Structure of Molecules You are asked by your instructor proceed by your instructor to construct a model of the NH,CI molecule. Being of a conservative to nat ure, you as directed in the section on Experimental Procedure. th Lewis strue- atom of a main group element is equal to the last digit in the 1. First you need to find the number of valence electrons in NH,CI. For counting purposes wi tures, the number of valence electrons in an grou p number of that element in the Periodic Table. CI is in Group . N is in Group His in Group- - -- In NH,CI there is a total of valence electrons. 2. The model consists of balls and sticks. a. How many holes should be in the ball you select for the N atom? b. How many holes should be in the ball you select for the H atoms? c. How many holes should be in the ball you seleet for the CI atom? The electrons in the molecule are paired, and each stick represents a valence eleciron pair d. How many sticks do you need? rule that N atoms form three bonds, whereas Cl and H atoms usually form only one. Draw a sketch of the skeleton below: 3. Assemble a skeleton structure for the molecule, connecting the balls and sticks to make one unit. Use the 4. a. How many sticks did you need to make the skeleton structure? b. How many sticks are left over? (continued on following

Explanation / Answer

1. N:- Gp-15, H:- Gp-1, Cl:- Gp-17 2. Total Valence electron in NH2Cl= 5+2+7= 14    .2(a)=3, 2(b)=2,2(c)=1 ,2(d)=3     3) H--N--H |    Cl    With 1 lone pair on N atom ,and 3 lone pair of electrons on Cl atom        5) Geometry of NH2Cl= Tetrahedral, Shape= Pyramidal,Hybridisation= sp3 .The molecule is polar ,since it doesnt contaiin a plane of symmetry   and also there is a net dipole moment which is in direction of lone pair of N atom and also rhe individual dipole N-->Cl is in direction opposite to N.   No,NH2Cl doesnt have any isomers.   6) No,NH2Cl does nt contain a resonating structure

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