Alpha particles bouncing off of gold foil.
Se2- has 34 protons and 36 electrons so it gets a 2- charge.
Answer:
C more collision between molecules
Explanation:
increase in heat causes increase in kinetic energy of the particles
It is more likely 9. pH 4 is acidic and pH 9 is basic, and as the pH of a substance gets closer to 0 or 14, the substance becomes more corrosive or reactive. As 4 is closer to 0 than 9 is to 14, there is a much higher chance the solution has a pH of 9, because pH 4 is less neutral and therefore more corrosive/reactive than pH 9.
