Explain the impact that changing concentrations has on a system in a state of dynamic equilibrium. What will happen when reactants are added to a reversible reaction mixture at equilibrium?

If the concentration of reactants is increased, equilibrium shifts in forward direction .In a reversible reaction, the products can react to produce the original reactants.

Explanation:

In a reversible reaction, the products can react to produce the original reactants. At equilibrium, the concentrations of reactants and products do not change. If a chemical reaction happens in a container where one or more of the reactants or products can escape, you have an open system.

i am going to put the answers in order i dint feel like typing it out so yeah

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oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).