1. Element X has two isotopes. The first isotope has a natural abundance of 80% and has a mass of 60 amu. The second isotope has a natural abundance of 20% and has a mass of 64 amu. Is the average mass going to be closer to 60 or 64 amu and why? The

The first element on the periodic table of elements is carbon. a. true b. false

What metric units would you use to measure the thickness of a key

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.