Consider the collection of nonmetallic elements O, P, Te, I and B. (a) Which two would form the most polar single bond? (b) Which two would form the longest single bond? (c) Which two would be likely to form a compound of formula XY2? (d) Which combinations of elements would likely yield a compound of empirical formula X2Y3?
Chemistry Vocabulary Chapter One Mixture: physical combination of two or more pure substances. There is no fixed ratio for the included substances. The substances can be physically taken apart. Solid: do not conform to their container, highly organized. Liquids: takes the shape of its container, moves a lot more. Gases: molecules move freely, they fill the whole container. Pure Substance: has a fixed composition that has not been changed Compounds: made up of atoms of two or more different elements. There is a fixed composition of atoms and molecules (ex. Amount of oxygen in H2O), and they must be chemically taken apart. Atoms: the smallest unit of an element that can exist as a stable, independent entity. You will never be able to see an atom. Elements: made up of atoms of one