5 Ionic Bonding

Question 1

Properties of ionic compounds

Answer 1

• High melting and boiling points
• hard and brittle
• not Malleable or ductile
• do not conduct electricity as solids
• good conductors as liquids or as a solute

Question 2

What is an ionic compound

Answer 2

The attraction/ bond between two atoms of opposite charges. An electron is transferred from one atom to another.

Question 3

Crystal lattice?

Answer 3

Large numbers of ionic bonds composed of cations and anions combine to form a 3D crystalline lattice pattern. Held together by ionic bonding which is the electrostatic attraction between ions.

Question 4

How do ionic bonds become conductive?

Answer 4

When ionic compounds melt and become liquids the charged particles are free to move around. This makes them good conductors.

Question 5

What substances can contain only non-metal atoms?

Answer 5

Some substances only containing non-metal atoms can be elements what is a compound
They usually have low boiling points and do not conduct electricity

Question 6

What is a molecule?

Answer 6

Molecules are discreet groups of atoms of known formula bonded together

Question 7

What are the forces of attraction in molecular compounds?

Answer 7

The bond within the molecules (intramolecular bonds) and the attraction between molecules (intermolecular forces)

Question 8

What does the melting and boiling points and nonmetallic elements and compounds rely on?

Answer 8

They depend on the intermolecular forces between the molecules. Generally the molecular substances have low, melting and boiling points, and one solid. The solid tends to be soft, indicating they have week forces of attraction between molecules.

Question 9

Do nonmetallic elements and compounds conduct, electricity

Answer 9

In general, they do not because they contain free, moving charge particles, neither delocalised electrons nor ions.

Question 10

How are atoms in a molecule held together?

Answer 10

Buy covalent bonds

Question 11

Define a covalent bond

Answer 11

Covalent bond involves the sharing of electrons.
When between nonmetallic atoms, they often enable the atom to gain valence shells containing eight electrons.

Question 12

What’s the difference between a single double and triple covalent bond?

Answer 12

Single covalent bond forms when two atoms share a pair of electrons
Double covalent bond forms when two atoms share two pairs of electrons
Triple covalent bond shares three pairs of electrons

Question 13

What are lone pairs?

Answer 13

Valence electrons that are not involved in bonding