Chemistry quiz (C1, C2, C4a)

Which of these are ionic compounds?

Answer explanation

Ionic bond is formed between metals and non-metals

Match the compound with the correct type of structure

• Simple covalent structure

• Oxygen

• Giant ionic lattice

• Sodium chloride

• Giant covalent structure

• Diamond

​ (a)   has a very high melting and boiling point due to (b)   ​ (c)   force between the ions

• Ionic compound
• strong
• electrostatic
• covalent compound
• weak
• intermolecular

Which gas is produced when group 1 metal reacts with water?

• Oxygen

• Hydrogen

• Carbon dioxide

• Nitrogen

Match the atom with the correct electron configuration

• 2.8.7

• O

• 2.8.1

• Cl

• 2.6

• Na

Oxygen gas has a ​ (a)   boiling point because of the weak​ (b)   which requires little ​ (c)   to break

• low
• intermolecular forces
• energy
• force
• colavent bonds
• high

To form a bond between Mg and O:

• 2 electrons get transferred from Mg to O

• 2 electrons get transferred from O to Mg

• 2 electrons get shared

• 4 electrons get shared

Water has a low melting and boiling point because:

• Water is a giant covalent structure

• Water is a simple covalent structure

• There are strong covalent bonds between the water molecules

• There are weak intermolecular forces between the molecules

Solid ionic compounds can conduct electricity

• True

• False

Answer explanation

In solid, ions cannot move, cannot conduct electricity

Put the group 7 elements in order of increasing reactivity

• Chlorine

• Iodine

• Bromine

• Fluorine

Answer explanation

The smaller the group 7 element's atom, the easier it is to gain electrons -> more reactive