Home > GCSE & A Levels Revision Questions

Q1.
This question is about structure and bonding.
The table below shows the structures of three compounds.
Compare the structure and bonding of the three compounds:
• carbon dioxide
• magnesium oxide
• silicon dioxide
___________________________________________________________
___________________________________________________________
(6)
-
Carbon dioxide and silicon dioxide are both made of atoms, but magnesium oxide is made of ions.
Silicon dioxide and magnesium oxide have giant structures, but carbon dioxide is made of small molecules with weak intermolecular forces.
All three compounds have strong bonds.
Both carbon dioxide and silicon dioxide are formed from two non-metals, so they have covalent bonds. This means electrons are shared between atoms.
Magnesium oxide is made from a metal and a non-metal, so it has ionic bonds, where electrons are transferred from magnesium to oxygen (two electrons are transferred).
In silicon dioxide, the bonds are single covalent bonds – each silicon forms 4 bonds, and each oxygen forms 2 bonds.
In carbon dioxide, the bonds are double covalent bonds – each carbon forms two double bonds, and each oxygen forms one double bond.

Leave a Reply