Draw the structures of all possible isomers for the following complexes. Indicate which isomers are enantiomer pairs. (a) Bromochloro(ethylenediamine)platinu m(II) (square-planar) (b) Tetra-amminedichloroiron(III) ion (octahedral) (c) Amminechlorobis(ethylenediamine)iro n(III) ion (octahedral)

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

The number at the end of an isotope’s name is the number.

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.