Which of the elements listed below would require the least amount of energy to remove an
electron?
Beryllium
Calcium
Lithium
Sodium?

The answer is actually sodium

Explanation:

Lithium actually requires more than sodium.

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:

56 moles of   lieter in chemistry