Intro to chem.- chapter 3
Terms
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- corfficient
- number placed in front of a symbol or formula in a chemical equation that indicates how many atoms or molecules of the substance are involved in the reaction.
- chemical symbol
- short hand way of repersenting an element.
- heterogenous matter
- matter that has parts with different properties.
- compound
- two or more elements chemically combined.
- atom
- smallest particle of an element that has the properties of that element.
- molecule
- combination of atoms formed by a covalent bond.
- chemical formula
- combination of chemical symbol usually used to reoresent a compound.
- chemical equation
- expression in which symbols and formulas are used to represent a chemical reaction.
- alloy
- solution of 2 metals or a metal and a nonmetal that has the properties of a metal.
- heterogenous mixture
- mixture that does not appear to be the same throughout.
- element
- simplest type of the pure substance.
- mixture
- matter that consits of two or more substances mixed together but not chemically combined.
- pure substance
- substance made of only one kind of material having difinite properties.
- homogenous mixture
- mixture that appears to be the same thorughout.
- subscript
- small number placed to the lower right of a chemical symbol that gives the number of atoms of the element in the compound.
- homogenous matter
- matter that has identical properties throughout.