An α particle is the nucleus of 4He to how many protons, neutrons and electrons exist in an alpha particle b) what is the charge of an α particle in units of electric charge(C. coulombs). c) What is the force that keeps the protons and neutrons in an α particle?

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

What are the similarities of physical and chemical change ?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.