🔹Topic 2 - Structure And Bonding

Question 1

What substance forms double covalent bonds?

Answer 1

Oxygen and carbon dioxide

Question 2

Why does NaCl have a high melting point?

Answer 2

Because it forms a giant ionic lattice made of strong electrostatic forces between alternating ions of positive and negative charge which requires a large amount of energy to break

Question 3

What structure does sodium chloride have?

Answer 3

A giant ionic lattice

Question 4

What’s the main difference between simple molecular substances and giant covalent substances?

Answer 4

Giant covalent substances consists of billions of atoms joined together while simple molecular substances have only a few

Question 5

Explain how particles in a metal are held together

Answer 5

Positive ions are attracted to the negative sea of delocalised electrons held by electrostatic forces of attraction between positive and negative ions