Chemistry 2.1.4

Question 1

Why do Non-Metal Atoms share Electrons with other Non-Metals?

Answer 1

To obtain a full Outer Shell of Electrons.

Question 2

When 2 Atoms share Pairs of Electrons, what do they form?

Answer 2

Covalent Bonds.

Question 3

Covalent Bonds between Atoms are very…

Answer 3

Strong.

Question 4

What is formed when 2 or more Atoms are Covalently Bonded together?

Answer 4

Molecules.

Question 5

What Forces exist between Individual Molecules?

Answer 5

Weak Intermolecular Forces.

Question 6

Why don’t Simple Covalent Bonds Conduct Electricity?

Answer 6

Because they do not contain Free Electrons.

Question 7

Name 2 examples of big Covalent Molecules: (2)

Answer 7

-Giant Covalent Structures.

-Polymers.

Question 8

Give 4 examples of Giant Covalent Structures: (4)

Answer 8

-Graphite.

-Fullerenes.

-Diamonds.

-Silicon Dioxide.

Question 9

What are the Advantages of Dot and Cross Diagrams? (2)

Answer 9

-Useful for illustrating the Transfer of Electrons.

-Indicates from which Atom the Bonding Electrons come from.

Question 10

What are the Disadvantages of Dot and Cross Diagrams? (2)

Answer 10

-Fails to illustrate the 3D Arrangements of the Atoms & Electron Shells.

-Doesn’t include the Relative Sizes of the Atoms.

Question 11

Name 3 different Diagrams that you can use to illustrate Molecules. (3)

Answer 11

-Dot and Cross Diagrams.

-Ball and Stick Models.

-2D Representations of Molecules.