Uranium-238 has a half-life of 4.46 billion years and is often analyzed
through radiometric dating to find the ages of rocks. U-238 decays in
a series that can be summarized by the equation shown below.
238 206 4 0
92.U 82 Pb + x He+ye
How many alpha particles, x, and how many beta particles, y, are
needed to balance the nuclear equation?
Select one
X = 8: y = 6
O
X = 4, y = 16
X = 5: y = 32
O
X = 16; y = 22

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.