This is because butterfly caterpillars are host specific. Plant-wise, the caterpillars of some butterfly species like asters, black-eyed Susan, clover, lupines, milkweed, sedum or violets. Aspen, birch, cherry, hackberry, oak or willow trees make caterpillars of other butterfly species equally happy.
each Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.ach Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.
nonpolar compound. Also found in: Dictionary, Thesaurus, Encyclopedia. Related to nonpolar compound: Polar bonds, Non-polar. nonÂ·poÂ·lar comÂ·pound. a compound composed of molecules that possess a symmetric distribution of charge, so that no positive or negative poles exist, and that are not ionizable in solution, for example, hydrocarbons.