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SCIENCE vocab. words
Question | Answer |
---|---|
Law of Conservation of Mass | that the mass that is in a closed system will remain constant regardless of how much time passes |
Physical Change | once you change something you can also change it back |
chemical change | once you change something, you cant change it back |
Element | one of a class of substances that cannot be separated into simpler substances by chemical means |
Chemical Formula | a representation of a substance using symbols for its constituent elements |
Element (Diatomic) Molecule | when a molecule is used to make an element |
Compound Molecule | when a molecule is used to make an element |
Chemical Reaction | reaction |
Reactants (in a chemical equation) | any substance that undergoes a chemical change in a given reaction. |
Products (in a chemical equation) | . a substance obtained from another substance through chemical change. |
Coefficient (in a chemical equation) | a number that is constant for a given substance, body, or process under certain specified conditions, serving as a measure of one of its properties |
Subscript (in a chemical equation) | A subscript is mostly used in chemistry, when you write out something like H20 the 2 would be smaller and written under the letter slightly hence the "sub" part. |