Electronic configuration of Rb: 2.8.8.8.8.3
Valence electron is 3....
because it can influence how frequently and sufficiently the particles collide depending on the space it has to do so, for example a large surface area would be have a slower rate of reaction and a lower temperature. (the rate of reaction in terms of concentration, it is diffused from high to low)
For 23., you have to find a way to measure your heart rate not increase it. search it up on google.
Yes, Titan is bigger than Mercury. So basically, it's true.
