Answer: The system will try and offset the change.
Explanation: Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.
This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in a direction to minimize the effect.
Thus if temperature is increased, the reaction will shift in a direction where temperature is decreasing and vice versa. Similarly if pressure is increased, the reaction will shift in a direction where pressure is decreasing and vice versa.
Use a periodic table. Count the exponent for your atomic number. So, 1s2 2s2 2p5= Fluorine 1s2 2s2 2p6 3s2 3p5= Chlorine 1s2 2s2 2p6 3s2 3p6 4s2 3d6= Iron
