2.2.1 - 2.2.2 - Covalent Bonding, Octet Rule, Lewis Formulas

Question 1

What does the electronegativity difference have to be for a bond to be covalent?

Answer 1

less than 1.8

Question 2

Why are electrons shared in a covalent bond?

Answer 2

to obtain a complete octet

Question 3

Which blocks does the octet rule apply to?

Answer 3

s and p blocks

Question 4

How many electrons are shared in a single bond?

Answer 4

2

Question 5

how many electrons are shared in a double bond?

Answer 5

4

Question 6

How many electrons are shared in a triple bond?

Answer 6

6

Question 7

In strength and length, how do single bonds compare to double and triple bonds?

Answer 7

single bonds are the weakest and longest while triple bonds are the strongest and the shortest and double bonds are in the middle of the two

Question 8

Which atoms may have incomplete octets?

Answer 8

Be, B, Al

Question 9

Which atoms can form triple bonds?

Answer 9

C and N

Question 10

Which atoms can form double bonds?

Answer 10

C, N, O, S

Question 11

How many electrons does H always need?

Answer 11

2

Question 12

When can halogens form expanded octets?

Answer 12

when they are the central atom

Question 13

When may linear shapes arise?

Answer 13

when there are two central atoms

Question 14

Why can’t nitrogen form expanded octets?

Answer 14

because there is no empty d orbital nearby