1) Atom a) An arrangement of elements by atomic number b) Molecules consisting of atoms of two or more chemical elements. c) Smallest unit of ordinary matter that forms an element d) A solid that emerges from a liquid solution e) Characteristic of a substance that is observed during a reaction f) Law that says mass cannot be created or destroyed 2) Coefficient a) A combination of symbols and number to represent a substance b) Individual particles are surrounded by solvent molecules and are separated from each other. c) A group of atoms bonded together d) Chemical composition or identity of the substance is changed e) The number in front of the formula / tells you how many molecules or compounds f) A substance that takes part in and undergoes change during a reaction 3) Periodic Table of the Elements a) Smaller number set below the rest of the text that means there are that number of that particular element in the molecule b) Characteristic of a substance that is observed during a reaction c) A substance that is formed as the result of a chemical reaction d) An arrangement of elements by atomic number e) Mixture of two or more substances f) Chemical composition or identity of the substance is changed 4) Chemical formula a) Smallest unit of ordinary matter that forms an element b) A combination of symbols and number to represent a substance c) Any substance that cannot be decomposed into simpler substances d) A group of atoms bonded together e) A usually reversible change in the physical properties of a substance, as size or shape f) Chemical composition or identity of the substance is changed 5) Compound a) Contains atoms of two or more chemical elements b) Any substance that cannot be decomposed into simpler substances c) A solid that emerges from a liquid solution d) Mixture of two or more substances e) A substance that takes part in and undergoes change during a reaction f) Smaller number set below the rest of the text that means there are that number of that particular element in the molecule

Chemistry

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