Nobel gases (inert gases) have full set of valence electrons so they DO NOT REACT with other elements. Noble gases are elements. A. stable
B. unstable

100mg magnesium reacts with 20ml of 1.0m hcl

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?

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory