What level of ecological organization so all the owls in a certain area represent?

How manyatoms of mercury are in 1.4214e+1 ml sample

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.

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron