Which two radioisotopes have the same decay mode? P-32 and Pu-239 Fr-220 and Ra-222 K-37 and K-42 U-233 and Tc-99

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.