Ionic Bonding

Question 1

What are ionic compounds made of

Answer 1

Oppositely charged ions held together by electrostatic attraction

Question 2

Key features of a Ionic compound

Answer 2

• regular structure
• Cubic shape
• giant repeating pattern
• high melting point
• brittle
  Giant ionic lattice

Question 3

Why are ionic compounds brittle

Answer 3

• When struck layers slide
• you get positive ions next to each other
• they repel and structure breaks into pieces

Question 4

How does size of charge on ion affect bond strength

Answer 4

• The bigger the charge on ion
• stronger electrostatic attraction
• Higher BP

Question 5

How does size of ion (radius) affect strength of bond

Answer 5

• Smaller the ion the stronger the electrostatic attraction
• Smaller ions can pack together more closely
• more energy required to overcome forces

Question 6

Isoelectric ions

Answer 6

Different atoms and ions with same number of electrons
Eg: Na+ = 10 electrons
Mg2+ = 10 electrons

Question 7

Name a source of evidence of charged particles

Answer 7

Electrolysis

Question 8

Describe the process electrolysis of copper chromate on wet filter paper

Answer 8

1- copper chromate placed on wet filter paper in middle
2- positive copper ions move to negative cathode
3- negative chromate ions move to positive anode