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a substance that cannot be separated or broken down into simpler substances by chemical means
an atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons
an atom, radical, or molecule that has gained or lost one or more electrons and has a poitive or negative charge
the attractive force between oppositely charged ions which form when electrons are transferred from one atom to another
the process by which one or more substances changes to produce one or more different substances
a substance that changes the rate of a chemical without being consumed or changed significantly
a type o protein or RNA molecule that speeds up metabolic reactions in plants and animals without being permnently changed or destroyed
a chemical reaction in which a reactant loses one or more electrons such that the reactant becomes more positive in charge
a chemical change in which electrons are gained, either by removal of oxygen, the addition o hydrogen, or the additive of electrons
the intermolecular force occurring when a hydrogen atom that is bonded to a highly electronegative atom of one molecule is attracted to two unshared electrons of another molecule
the attractive force between two bodies of different substances that are in contact with eachother
the amount of a particular substance in a given quantity of a mixture , solution, or ore
a range of values that are used to express the acidity or basicity of a system low numbers are acidic, high numbers are basic
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