Lewis structures/Polarity

Question 1

How many valence electrons do most atoms hold ( According to oculet rule)

Answer 1

8 valence electrons

Question 2

Pairs of valence electrons not involved in bonding

Answer 2

Lone pairs

Question 3

≡

Answer 3

Triple Bond

Question 4

=

Answer 4

Pi/Double Bond

Question 5

-

Answer 5

Single/Sigma Bond

Question 6

Is H-C-H polar?

Answer 6

No, the hydrogen atoms cancel each other

Question 7

What determines the center atom?

Answer 7

Usually will be the one that has the most unpaired valence electrons. Usually the least electronegative.

Question 8

How do you calculate the total number of valence electrons in a molecule?

Answer 8

Calculate the total number of valence electrons in the molecule by adding the valence electrons from each atom.

Question 9

Exception to oculet rule: How many valence electrons does Hydrogen (H) need?

Answer 9

2 valence electrons

Question 10

Exception to oculet rule: How many valence electrons does Lithium (LI) need?

Answer 10

2 valence electrons

Question 11

Exception to oculet rule: How many valence electrons does Bromine (B) need ?

Answer 11

6 valence electrons

Question 12

Exception to oculet rule: How many valence electrons does Aluminum (Al) need?

Answer 12

6 valence electrons

Question 13

What does it mean for a molecule to be polar?

Answer 13

One end of the molecule has a positive electrical charge and the other side has a negative charge.

Question 14

What does it mean for a molecule to be non polar?

Answer 14

Anything that is not polar (one end positive and other negative canceling out

Question 15

Are polar molecules water soluble?

Answer 15

polar molecules are water soluble

Question 16

Are non polar molecules water soluable?

Answer 16

No they are not