chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Law of conservation of mass | Nothing is ever created or destroyed, only changed.
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| Physical change | A usually reversible change in the physical properties of a substance, as size or shape.
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| Chemical Change | A usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance.
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| Element | One of a class of substances that cannot be separated into simpler substances. The simplest form of matter.
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| Chemical formula | A representation of a substance using symbols for its constituent elements.
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| Element (diatomic) molecule | A molecule consisting of 2 atoms either the same or different elements.
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| Compound Molecule | a compound made of 2 or more nonmetal elements.
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| Chemical equation | A symbolic representation of what happens when chemicals come in contact with one another. A balanced chemical equation shows how many of what molecules react, how many of what molecules result, and sometimes the state of the substances
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| Chemical reaction | A process in which one or more substances reactants are chemically changed into one or more new substances products.
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| reactants (in a chemical equation) | A substance participating in a chemical reaction, especially a directly reacting substance present at the initiation of the reaction.
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| Products (in a chemical equation) | A product is a substance that is formed as the result of a chemical reaction.
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| coeffiecent (in a chemical equation) | Coefficient is the number of molecules of reactants or products.
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| subscript (in a chemical equation) | It is the number of atoms in the preceding element.
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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