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In graphite, each carbon atom is covalently bonded to three other carbon atoms. One of the four outer shell electrons of each carbon atom is therefore not engaged in bonding, and becomes delocalised. Thes...

In group 2 elements, the reactivity is a measure of how easily the atoms lose outer shell electrons. An atom at the top of the group, such as magnesium, has less shells meaning the atomic radius is smalle...

Firstly, we write down all the information we are given from the question into mathematical form.

This equation is 4a-b=38                                        The valu...

A giant metallic lattice – the crystal lattice of metals consists of regularly arranged  ions (NOT atoms) surrounded by a ' delocalised sea of electrons' that form the giant lattice. 

The...

i) Concentration of reactants, or pressure for gases-  As there are more particles in a certain volume, they collide more often so there is a greater chance of successful collisions per unit timeii) Press...