A. Predict the ionization energy of Be3+ in its ground state given that the ionization energy of Li2+ in its ground state is 122:45 eV. Notice that the number of protons and neutrons in the nuclei of both Li and Be make their nuclear masses effectively in nite compared with the mass of the electron. b. What is the ionization energy expressed in atomic units for a Li2+ ion in a 4py electronic state?

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 is the approximate vapor pressure when the gas condenses at 70 degrees celsius

What element has similar physical and chemical properties as boron.