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Science Flashcard
Vocab
Question | Answer |
---|---|
What is the Law of Conservation of Mass? | Matter cannot be created or destroyed. |
What is Physical Change? | Change in the physical properties of a substance. |
What is a Chemical Change? | Rearrangement of the atoms of a substance and a change in their chemical properties. |
What is a Element? | A material which cannot be broken down or changed into another substance. |
What is a Chemical Formula? | An expression which states the number and type of atoms present in a molecule of a substance. |
What is a Diatomic Molecule? | Diatomic molecules are molecules composed only of two atoms either the same or different chemical elements. |
What is a Compound Molecule? | Contains at at least two different elements. |
What is a Chemical Equation? | A chemical equation is a written visual that occurs in a chemical reaction |
What is a Chemical Reaction? | A chemical reaction occurs when one or more chemicals react to become different chemicals. |
What are Reactants? | They are on the left side of the equation with an arrow pointing to the substances being formed on the right. |
What are Products? | When two substances react and their atoms in their molecules change, making a product. |
What is a Coeffient? | The number of molecules of each reactant and product. |
What is a Subscript? | Number of atoms of an element in each bit. |