Question

explain how the chemical equation in forms about the nature of the elements and the direction of the reaction?

Answer 1

chemical equation show the symbol and state(like aq,s,l,g).thus ,it shows the nature of element.
it also shows the direction of equation because it also shows that the reaction is reversible or irreversible

Answer 2

A chemical equation give information of what is happening in the change .
It give Information about changes that occurs due to interaction of the reactants.
U have asked about nature

Consider a rxn
N2(g) +3H2(g) -------->2NH3 ( g)
<--------
here (g) indicates the nature of the reactants and product .
in Above equation it is gas

And double arrows shows that the rxn is reversible means we can again get nitrogen and hydrogen from the ammonia.
CH4(g) +2O2(g)------>CO2(g) +2H2O(l)
Combustion of methane is not reversible process.

We get this information from equation

hope this helps.