Which of the following describe metalloids? A. mostly solids, shiny, high density, conductors
B. mostly solids, dull, brittle, reactive, conductors
C. mostly gases, brittle, dull, low density, insulators
D. all solids, shiny, brittle, conductors, medium density

Why is permeable soil best for plants that need a lot of drainage?

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

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.