Explain the relationship between forward and reverse reactions at equilibrium and predict how

changing the amount of a reactant or product (creating a stress) will affect that relationship.

for example (select one from each section)

if the amount of (reactant or product) increases, the rate of the (forward or reverse) reaction will

(increase or decrease) to reach a new equilibrium.

if the amount of (reactant or product) decreases, the rate of the (forward or reverse) reaction will

(increase or decrease) to reach a new equilibrium.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

the answer is barium and copper bromide