Bonding and Structure

Question 1

What are small molecules?

Example: Oxygen difluoride

Answer 1

A group of two or more atoms joined by covalent bonds.

Question 2

Compare the bonding in hydrogen gas (H2) with the bonding in copper metal.

Hydrogen- ____________ bonding.
Copper- ___________ bonding.

Hydrogen- shares _______ of electrons.
Copper- share _____________ electrons.

Hydrogen- __ atoms bonded together.
Copper- ________ atoms bonded together.

Answer 2

covalent
metallic

pairs
delocalised

2
many

Question 3

Give 2 similarities of the bonding in hydrogen gas (H2) with the bonding in copper metal.

Answer 3

Strong bonds between atoms.
Both bonding involves outer shell electrons.

Question 4

What is the difference between small molecules and giant covalent structures?

Small molecules are only ____________________ joined by covalent bonds.

Giant covalent structures contain ___________ joined by covalent bonds in a _______________________.

Answer 4

two or more atoms

many atoms
regular arrangement

Question 5

Why can’t giant covalent structures conduct electricity?

Answer 5

They have no freely moving ions.
So they cannot carry a current/ charge.

Question 6

Explain why hydrogen chloride gas cannot conduct electricity but hydrochloric acid can. (3)

Hydrogen chloride molecules do not have an ____________________.
Hydrochloric acid contains _____,
they are _______ to move so a ___________________.

Answer 6

overall electric charge
ions
free
charge can flow