An electron moves from an energy level of -8.6 eV to another level of -3.5 eV. Determine the frequency of the absorbed radiation. [1 eV = 1.6 × \(10^{19}\) J, h = 6.6 × \(10^{34}\) Js]
A liquid is left in an open dish. After several days, there is less liquid in the dish. Which of the following statements explains this observation? The
A.
most energetic molecules leave the surface and escape into the air.
B.
least energetic molecules leave the surface and escape into air.
C.
most energetic molecules leave the surface and return.
D.
least energetic molecules leave the surface and return.
