Acceleration is the rate of change of velocity with time.
PH = -log[H+]
That is, pH is the negative logarithm of the hydrogen ion concentration.
pOH = -log[OH-]
pOH is the negative logarithm of the hydroxide ion concentration.
The correct answer to your question is a. The negative logarithm of the hydrogen ion concentration.
All of the above I think it might not be right
There is 11 valence electrons in sodium (Na)