Ahydrogen electron jumps from energy level n = 2 to n = 4 after energy absorption. what will the spectral lines emitted by this electron look like under a spectroscope?
a. a dark line spectrum
b. white light
c. a continuous spectrum
d. a bright line spectrum

One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.