How is the modern periodic table arranged ? a. by atomic weight, with chemical families or groups in columns and periods in rows. b. by atomic weight, with chemical families or groups in rows. c. by atomic number, with chemical families or groups in columns and periods in rows d. by atomic number, with chemical families or groups in rows and periods in columns

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots