What is the atomic number of an atom? O the number of neutrons
O the number of electrons and neutrons
O the number of protons
the number protons and neutrons

In a copper wire, a temperature increase is the result of which of the following

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.

Do polar molecules have ionic bonds?