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chapter 9

physical science

TermDefinition
chemical formula a shorthand way to record the composition of a pure substance
subscript tell how many of each kind of atom are present number below line
oxidation numbers tell the number of electrons that an element's atoms gain or lose as they bond to other atoms
polyatomic ions several atoms joined together chemically to act as a single charged particle
binary compounds compounds with only two elements
ternary compounds compounds that contain polyatomic ion and one or more additional elements in their formulas
law of conservation of matter matter can neither be created nor destroyed
word equation written out using words
formula equation using chemical symbols
reactants are represented by the formulas on the left side of the reaction
products are represented by the formulas on the right side of the equation
coefficients the numbers in front of the formula
composition reaction combine several substances into one complex compound
decomposition reaction decompose or take apart a molecule
single-replacement reaction one element in an existing compound is replaced by another element
activity series a list of metals arranged according to their ability to replace other elements in chemical reactions
double-replacement reaction two compounds divide and swap parts with each other
exothermic reaction reactions that give off heat
endothermic reaction reaction that absorb energy
Created by: deb_torres14