Lewis Structures

Question 1

How many bonds does carbon in a molecule have?

Answer 1

4

Question 2

How many bonds does oxygen in a molecule usually have?

Answer 2

2

Question 3

How many bonds does nitrogen in a molecule have?

Answer 3

3

Question 4

How many bonds does hydrogen in a molecule have?

Answer 4

1

Question 5

How many bonds do halogens in molecules have?

Answer 5

1

Question 6

What are the 5 steps in drawing Lewis structures?

Answer 6

1) Find the total number of valence electrons

2) Draw a line between bonded atoms

3) Allocate remaining electrons as lone pairs to each atom joined to the central atom (except H)

4) Place remaining electrons as lone pairs on the central atom

5) If the central atom does not have an octet, take a lone pair and form a multiple bond to the central atom.

Question 7

What two questions do you ask to check if a Lewis structure is correct?

Answer 7

Are all valence electrons accounted for? Does each atom have an octet?

Question 8

In molecules with at least three atoms, which atom is the central atom?

Answer 8

The least electronegative one

Question 9

Is hydrogen ever the central atom?

Answer 9

No, it is always a terminal atom

Question 10

What is a coordinate covalent bond?

Answer 10

A bond where the shared electron pair comes from one atom.