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The answer is equilibrium.
This is what is called dynamic equilibrium. It is the most common form of equilibrium in chemistry. It means that in average the system is not changing but if you look particle by particle they are changing. Giving that the rate at which the parciles pass from phase A to phase B is the same at which the particle pass from phase B to phase B, the system does not change, i.e. it is in equilibrium.
Answer:
Kp of the reaction is 0.0215
Explanation:
Step 1: Data given
Partial pressure at the equilibrium of N2 = 0.22 atm
Partial pressure at the equilibrium of O2 = 0.19 atm
Partial pressure at the equilibrium of NO = 0.030 atm
Temperature = 2200 °C
Step 2: The balanced equation
N2(g) + O2(g) ⇌ 2NO(g)
Step 3: Calculate Kp
Kp = (pNO)² /(pO2)*(pN2)
Kp = (0.030)²/(0.19*0.22)
Kp = 0.0215
Kp of the reaction is 0.0215
I'm pretty sure the answer is the first one. The fact that it doesn't have a full valence shell means that electrons from other atoms can react and bond with the sodium atom.
Hope this helps x