The minimum amount of energy that has to be added to start a reaction is the activation energy, which starts the reaction. It activates it.
Well..... it would be a mechanical mixture because you use mechanical energy when you squeeze it and the mixture is the juice and the pulp.
I would say the answer to this question is yes.
Sodium ion has 10 electrons. So: 1s^2 2s^2 2p^6
