Pls help me with this questions for 30 points and brainiest

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?