Helpits for amplify science chapeter 3 3.1

When will le chatelier's principle come into effect? at the beginning of a reaction, when there are only reactants when a reaction has reached chemical equilibrium when a catalyst is added to a reaction mixture when a reaction is occurring but not yet at equilibrium

How many neutrons does a atom of cobalt have?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?