Covalent Bonds and Giant Covalent Structures

What are simple molecular substances?

• Small molecules made up of conveniently bonded atoms

• Huge numbers of non-metal atoms bonded together

• Regular repeating lattices of covalently bonded atoms

• Atoms with full outer shells

What is the main difference between simple molecular substances and giant covalent structures?

• Simple molecular substances have weak intermolecular forces, while giant covalent structures have strong covalent bonds

• Simple molecular substances have high melting and boiling points, while giant covalent structures have low melting and boiling points

• Simple molecular substances conduct electricity, while giant covalent structures do not

• Simple molecular substances are made of non-metal atoms, while giant covalent structures are made of metal atoms

Why do simple molecular substances have low melting and boiling points?

• Because the weak intermolecular forces between molecules are easy to break

• Because the strong covalent bonds between atoms are easy to break

• Because the molecules have no electric charge

• Because the molecules contain charged particles

What happens to the boiling points of halogens as you go down the group?

• The boiling points decrease

• The boiling points stay the same

• The boiling points increase

• The boiling points become unpredictable

Why do giant covalent structures have high melting and boiling points?

• Because they contain charged particles

• Because they have weak intermolecular forces

• Because they have strong covalent bonds

• Because they are made of metal atoms

Which of the following is NOT a giant covalent structure?

• Diamond

• Graphite

• Silicon Dioxide

• Chlorine

What is the main component of sand?

• Diamond

• Graphite

• Silicon Dioxide

• Chlorine

Why do giant covalent structures generally not conduct electricity?

• Because they contain charged particles

• Because they have weak intermolecular forces

• Because they have strong covalent bonds

• Because they are made of metal atoms

Which of the following is true about simple molecular substances?

• They have regular repeating lattices

• They conduct electricity

• They are made of metal atoms

• They have high melting and boiling points

What is the main difference between graphite and other giant covalent structures?

• Graphite conducts electricity

• Graphite has low melting and boiling points

• Graphite is made of metal atoms

• Graphite has weak intermolecular forces