Which number most likely represents the first ionization energy, in kilocalories per mole of atoms, for a nonmetallic element?

1.96
2.138
3.194
4.239

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

What natural processes produce large quantities of co2

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.