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Chemistry Vocabterms
Naiha Dhillon 10/4 homework assignment
Question | Answer |
---|---|
Law of Conversion of Mass | mass cannot be created or destoryed |
physical change | substances are not altered chemically |
Element | one of a class of substances that cannot be separated into simpler substances by chemical means |
chemical change | when a substance undergoes a chemical reaction and produces a new substance |
Chemical Formula | an expression in words or symbols that describes precisely a particular chemical change |
Element | molecule of only one type of element |
Compound Molecule | molecule that contains at least two different elements |
Chemical equation | representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product |
Chemical reaction | process that leads to the transformation of one set of chemical substances to another |
Reactants | substance that takes part in and undergoes change during a reaction |
Products | tells how many atoms of that element are in a molecule or formula |
Coefficent | number before molecule indicating how many |
Subsctipt | tells how many atoms of that element are in a molecule or formula |
Diatomic molecule | molecules composed only of two atoms, of either the same or different chemical elements |