Chemistry
Why do ionic compounds have high melting points?
Ionic compounds have high melting points because they are giant lattices of oppositely charged ions. Every ion is held by strong electrost...
Posts
Newest first
Chemistry
Aluminium oxide formula: why Al2O3? Valency explained
Aluminium oxide is Al 2 O 3 because an aluminium ion has a charge of 3+, an oxide ion has a charge of 2−, and a compound has no overall c...
Chemistry
Why is chlorine's atomic mass 35.5? Isotopes explained
Chlorine's relative atomic mass is 35.5 because natural chlorine is a mixture of two isotopes, chlorine-35 and chlorine-37, and about ...
Chemistry
Is Air a Mixture or a Compound? Separating Mixtures
Yes, air is a mixture. Its gases (mostly nitrogen, oxygen and a little argon) are not chemically combined, its make-up changes from day to...