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unit 4

QuestionAnswer
chemical equation The way of expressing the chemical reaction of two or more compounds.
chemical formula The way of expressing the atoms in a compound.
inorganic compounds Compounds without carbon.
organic compounds Compounds that contain carbon.
nonpolar bonds A nonpolar bond is a covalent bond between two nonmetal atoms where the electrons forming the bond are equally distributed. Therefore, the molecule has a zero charge.
polar bond A polar bond is a covalent bond between two nonmetal atoms where the electrons forming the bond are unequally distributed. Therefore, one part of molecule is positive and the other negative. Ex. water
molecular compound A compound with covalent bonds. Same as a covalent compound.
diatomic elements The elements ending with "-gen" including halogens form diatomic molecules.
covalent bonds sharing electrons
ionic bonds gaining or losing electrons
valence electron electrons on the outer rim
isotope each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons
ion an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
reacants a substance that takes part in and undergoes change during a reaction.
products an article or substance that is manufactured or refined for sale:
coefficients a multiplier or factor that measures some property:
exothermic reaction Exothermic reactions give off heat (product). It gives off heat to its surrounding (the water). The extra heat makes the solution hotter and so temperature goes UP.
endothermic reaction Endothermic reactions require heat to proceed. The heat that they use up comes from the solution. Since heat is being used up, the temperature drops.
acid a molecule or other entity that can donate a proton or accept an electron pair in reactions.
base have as the foundation for (something); use as a point from which (something) can develop:
pH scale The pH scale measures how acidic or basic a substance is.
Created by: 3091939
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