Answer:
Step-by-step explanation:
Potassium:
Part 1: To calculate the velocity of the electrons from potassium, we need to know their mass and the speed of light. The mass of an electron is 1.6 x 10-27 kg and the speed of light is 299,792,458 meters per second. Thus, the velocity of the electrons from potassium is 6.8 x 10-8 meters per second.
sodium:
This works out to 5.6 times 10 to the fifth meters per second, would be the velocity of the electron from sodium.