Choose all the answers that apply. The elements in group 18 .

are in a group called the noble gases
are gases at room temperature
usually do not react with other elements
are nonmetals
are highly reactive

Sorry i dont understand the question can you rephase it?

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.