Chapter 10 Part 1 Homework Assignment (55 points total) Complete the following q

Question

Chapter 10 Part 1 Homework Assignment (55 points total) Complete the following questions that concern material from Chapter 10 Sections 1-3 (Exam 3 Material) This assignment is due in class on Wednesday November &" (by 12:30pm) Assignments may be submitted online or in class. Late assignments will not be accepted! 1. (4 points) For the following questions, circle if the statement is true or false. a. Each atom of a Lewis structure MUST have eight electrons. b. Hydrogen atoms are often the central atom of a Lewis structure. c. For a neutral molecule, the number of electrons in the Lewis structure True/False True /False is the sum of the valence Electrons for the atoms. True/False d. Electrons of covalent compounds may be shared between atoms. True /False 2. (5 points) A covalent compound is composed of a phosphorus atom and three bromine atoms a. How many electrons should the Lewis structure of the covalent compound contain? b. What is the correct Lewis structure for this compound? c. How many bonding electrons and lone pair electrons are there in the Lewis structure? 3. (4 points) Determine the total number of valence electrons in each of the following a. COCh d. SeCl

Explanation / Answer

Ans 3 :

The number of valence electrons in a molecule can be calculated by adding the number of valence electrons of its individual atoms.

So the valence electrons in these molecules are :

a) COCl2 : 24

b) N2O : 17

c) ClO2- : 20

d) SeCl2 : 20

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