Refresher

Question 1

Theme of electronegativity

Answer 1

Top right corner is most electronegative

Question 2

What element can you just ignore when drawing structures

Answer 2

O

Question 3

What structures are monovalent and what does that mean

Answer 3

H and halogens (F, Cl, Br, I) and they can just make one bond

Question 4

How to determine degrees of unsaturation

Answer 4

[(2n+2)-actual]/2

Question 5

What is DBE

Answer 5

degrees of unsaturation, every one means a double bond

Question 6

What is an isomer

Answer 6

a different form of the same structure

Question 7

How do you count formal charge

Answer 7

count each bond as one and each electron as one and any extra from expected (from periodic table) is - and less is +

Question 8

What is the smallest ring

Answer 8

3 points

Question 9

How do you know what the best structure is when they both have a charge

Answer 9

charge is on the most electronegative atom

Question 10

On a bond line, what is the rule about writing carbons

Answer 10

Once you write a carbon, you much write the hydrogens attached to them

Question 11

How many carbons are needed for bond-line

Answer 11

at least 3

Question 12

How many sigma bonds are in a pi bond

Answer 12

2

Question 13

4 VSPER Units hybridization, geometry, bond angle

Answer 13

sp3, tetrahedral, 109.5

Question 14

3 VSPER Units hybridization, geometry, bond angle

Answer 14

sp2, trigonal planar, 120

Question 15

2 VSPER Units hybridization, geometry, bond angle

Answer 15

sp, linear, 180

Question 16

How do more bonds affect the length

Answer 16

more bonds = stronger = shorter

Question 17

Rules for determining to major resonance contributor

Answer 17

filled octet, minimum charge, positive charge on less electronegative atom and negative on most electronegative atom

Question 18

pi bond and lone pairs should be in what relation to each other

Answer 18

next to each other

Question 19

When averaging bond length, the number favors what

Answer 19

favors the majority resonance structure

Question 20

London Forces

Answer 20

interactions between electron clouds

Question 21

How does surface area affect melting and boiling point

Answer 21

higher surface area, higher mp and bp

Question 22

Dipole-dipole

Answer 22

positive end of one dipole interacts with the negative end of another dipole

Question 23

Hydrogen bonding

Answer 23

very strong dipole-dipole interaction when H bonds with N, O, or F

Question 24

How does H bonding affect bp

Answer 24

makes it go up

Question 25

How does symmetry affect mp

Answer 25

makes it go up

Question 26

What does hydrogen bonding have to do with solubility

Answer 26

compound will be soluble if it has both hydrogen donors and acceptors and 5 carbons or less; if they have only acceptors they will be soluble if they have 3 carbons or less