Lewis Diagrams

Question 1

ROT for C atoms

Answer 1

Always form 4 covalent bonds

Question 2

ROT for O atoms

Answer 2

Always form 2 covalent bonds

Question 3

ROT for N atoms

Answer 3

Always form 3 covalent bonds

Question 4

Rest of atoms?

Answer 4

Always form single covalent bonds

Question 5

1st step for drawing Lewis diagrams

Answer 5

Count the number of valence electrons available for bonding

Question 6

2nd step for drawing Lewis diagrams

Answer 6

Bond the central atom to the neighboring atom with a pair of electrons

Question 7

3rd step for drawing Lewis diagrams

Answer 7

Add pairs of electrons to neighboring atoms to fulfill the octet rule

Question 8

4th step for drawing Lewis diagrams

Answer 8

Place any remaining electrons on central atoms

Question 9

5th step for drawing Lewis diagrams

Answer 9

Shift non-bonded pairs to bond sites to attain octet rule

Question 10

What is the Octet Rule?

Answer 10

Atoms want to have 8 electrons in their valence shell to be stable. There should be 8 electrons around each atom. The exception is hydrogen which only needs 2 atoms.

Question 11

What is a Lewis diagram of CO2?

Answer 11

C=4 ::O=C=O::
O=6x2
=16 electrons