Explain, in terms of its structure and bonding, why magnesium oxide has a very high melting point (4).
Magnesium oxide has a giant 3D lattice structure formed by strong electrostatic forces of attraction between the positively charged magnesium ions and the negatively charged oxygen ions. These ionic bonds require a lot of energy to overcome, and therefore the substance has a high melting point.
LH
Related Chemistry GCSE answers
All answers ▸How do I draw a dot and cross diagram for a molecule with a double bond
Describe how and explain why vegetable oils are hardened for use in foods.
How does the reactivity of group 7 elements (the halogens) change down the group and why? (A Level)
Describe the electrons in Benzene