substance that cannot be chemically broken down into simpler substances
substance made up of two or more elements that are chemically combined
two or more substances that have been physically combined
any element or compound
smallest part of any substance that has all the properties of that substance
force of attraction that holds atoms together
electron in the outermost energy level of an atom
atom with an electrical charge
bond formed between atoms that have gained or lost electrons
bond formed when atoms share electrons
compound containing carbon
study of organic compounds
molecular model that uses straight lines to indicate bonds
large molecules that are formed by many smaller molecules
sugars and starches
compounds used to build and repair body tissues
building blocks of proteins
compounds made up of carbon, oxygen, hydrogen, nitrogen, and phosphorus
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