CHEM 219 ACTUAL MODULE 1 | 50 COMPLETE QUESTIONS AND ANSWERS | 2026 LATEST UPDATED| 100% RATED CORRECT | GET A+!!

CHEM 219 ACTUAL MODULE 1 | 50 COMPLETE QUESTIONS AND ANSWERS | 2026

LATEST UPDATED| 100% RATED CORRECT | GET A+!!

On a piece of scratch paper, write out the Lewis Dot Diagram for each of the indicated elements and

determine the following for each:

a) The number of Lone Pairs the atom possesses in its valence shell.b) The number of Unpaired

Electrons the atom possesses in its valence shell.c) The number of bonds the atom will form.




Oxygen

Carbon

Hydrogen

Nitrogen - (Answer)Oxygen - a) 2 b) 2 c) 2

Carbon - a) 0 b) 4 c) 4

Hydrogen- a) 0 b) 1 c) 1

Nitrogen - a) 1 b) 3 c) 3




Classify the bonding between the given pairs of atoms as ionic, covalent, or polar covalent. Use the

table of electronegativities shown below to help with the classification.

, a. Br and Br

b. K and Cl

c. P and Cl

d. C and O

e. Na and Br - (Answer)a. Br-Br: Electronegativity difference () = 0 = COVALENT (or pure

covalent)

b. K-Cl: () = 2.2 = IONIC

c. P-Cl: ()= 0.9 = POLAR COVALENT

d. C-O: ()= 1.0 = POLAR COVALENT

e. Na-Br: () = 1.8 = POLAR COVALENT




Define the term constitutional isomer. - (Answer)Two (or more) different chemical compounds with

the same molecular formula but different connectivity between the atoms in their structural formulae.




Explain (using specific evidence) what makes the following two compounds constitutional isomers

of one another: - (Answer)Both compounds have a MF of C3H6O - same MF.

Compound "a" has a 3-carbon chain with a C=O in the middle. No H atom connected to C of C=O.