ch 1 - Muhammad T. Seedat Drazinski Ap Chem- Chapter 1 I....

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Muhammad T. Seedat Drazinski Ap Chem- Chapter 1 I. 1.1 The Study of Chemistry A. Chemistry is the study of the properties of materials and the changes that materials undergo B. The Molecular Perspective of Chemistry 1. Matter- anything that occupies space and has mass; physical material of the universe 2. Elements- a substance that cannot be separated into simpler substances by chemical means 3. Atoms- the smallest representative particle of an element 4. Molecule- a chemical combination of two or more atoms II. 1.2 Classification of Matter A. States of Matter 1. The three forms of matter are called the states of matter 2. A gas has no fixed volume or shape; rather, it conforms to the volume and shape of its container. A gas can be compressed to occupy a small volume, or it can expand to occupy a larger one. 3. A liquid has a distinct volume independent of its container but has no specific shape. It assumes the shape of the portion of the container it occupies. 4. A solid has both a definite shape and a definite volume; it is rigid. 5. Neither liquids nor solids can be compressed to any appreciable extent. 6. In a gas the molecules are far apart and moving at high speeds, colliding repeatedly with each other and with the walls of the container. In a liquid the molecules are packed more closely together, but still move rapidly, allowing them to slide over each other; thus, liquids pour easily. In a solid the molecules are held tightly together, usually in definite arrangements, in which the molecules can wiggle only slightly in their otherwise fixed positions. Thus,
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ch 1 - Muhammad T. Seedat Drazinski Ap Chem- Chapter 1 I....

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