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19 terms

Chapter 4- Compounds and Mixtures

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