Which describes the polarity in a water molecule?

a
partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms

b
partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms

c
partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms

d
partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms

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.