Which one of the elements below is most likely to form a +2 ion? N

C

Ca

K

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Which three statements represent the benefits of performing experiments using computer simulations?