What is the total number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne?
(1) 1 (3) 3
(2) 2 (4) 4

What was bohr’s contribution to the planetary model

Which terms are used to identify pure substances

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.