Any method of determining whether an event or object is older or younger than others

It would be true sodium reacts with water in a violent way 

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -

True or false:   the purpose of a defense mechanism is to get uncomfortable feelings out into the open so they can be dealt with in a healthy manner.indeed true: )