AQA GCSE CHEMISTRY:QUESTIONS AND ANSWERS BONDING
What elements bond in ionic bonding?
Non metals and metals
What elements bond in covalent bonding?
Non metals
What elements bond in metallic bonding?
Metals
What happens during ionic bonding?
Electrons move from the outer shell of the metal to the outer shell of the non metal.
What happens to the metal in ionic bonding?
It loses electrons and becomes positively charged
What happens to the non metal in ionic bonding?
It gains electrons and becomes negatively charged
Why do ionic compounds have high melting and boiling points?
The ions are arranged in a regular lattice, and held together by strong forces of attraction within
this. This means a lot of force is required to break them apart.
What happens during metallic bonding?
Positive metal ions are surrounded by delocalised electrons that move in between the regular
layers
Why can metals conduct electricity?
The delocalised electrons can move and carry charge. This happens in all states
What are alloys?
substances made from two or more different metals mixed together
Why do alloys have different properties to metals?
They don't have regular layers so are stronger and have higher melting points
What happens in covalent bonding?
A shared pair of electrons between non metals from the outer shell
What are the properties of simple covalent molecules?
What elements bond in ionic bonding?
Non metals and metals
What elements bond in covalent bonding?
Non metals
What elements bond in metallic bonding?
Metals
What happens during ionic bonding?
Electrons move from the outer shell of the metal to the outer shell of the non metal.
What happens to the metal in ionic bonding?
It loses electrons and becomes positively charged
What happens to the non metal in ionic bonding?
It gains electrons and becomes negatively charged
Why do ionic compounds have high melting and boiling points?
The ions are arranged in a regular lattice, and held together by strong forces of attraction within
this. This means a lot of force is required to break them apart.
What happens during metallic bonding?
Positive metal ions are surrounded by delocalised electrons that move in between the regular
layers
Why can metals conduct electricity?
The delocalised electrons can move and carry charge. This happens in all states
What are alloys?
substances made from two or more different metals mixed together
Why do alloys have different properties to metals?
They don't have regular layers so are stronger and have higher melting points
What happens in covalent bonding?
A shared pair of electrons between non metals from the outer shell
What are the properties of simple covalent molecules?
