EL5a - Bonding

Question 1

What is a covalent bond?

Answer 1

The attraction between two nuclei and a pair of electrons they share

Question 2

A covalent bond is between….

Answer 2

Two non-metals

Question 3

What is an example of a molecule forming a less than octet?

Answer 3

BF3

Question 4

What is an example of an expanded octet?

Answer 4

SF6

Question 5

Elements in groups __-__ from period ____ down can form expanded octets

Answer 5

Groups 5-7

Period 3 down

Question 6

What is a better rule than the octet rule?

Answer 6

• Unpaired electrons pair up

- Max number of e- that can pair up = number of e- in outer shell

Question 7

Covalent bonds can be found in 2 different types of structures:

Answer 7

Simple molecular structures

Giant covalent networks

Question 8

Simple molecular structures have what strength bonds?

Answer 8

• Weak inter-molecular bonds

- Strong intramolecular (covalent) bonds

Question 9

Simple molecular structures have

• ____ melting points
• are _____ electrical conductors
• have a ____ solubility

Answer 9

Low
Poor
Low

Question 10

Give two examples of giant covalent structures and how many bond each Carbon forms

Answer 10

Diamond - 4

Graphite - 3

Question 11

Do molecular compounds conduct electricity?

Answer 11

No