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Science Vocab
Question | Answer |
---|---|
What is the Law of conversion of mass? | Matter can not be created nor distroyed |
What is Physical change? | a change from one state (solid or liquid or gas) to another without a change in chemical composition. |
What is Chemical change? | when a substance combines with another to form a new substance |
What is an element? | An element is a substance that is made entirely from one type of atom |
What is a chemical formula? | a representation of a substance using symbols for its constituent elements. |
What is a element(diamotic)molecule? | A molecule is formed when two or more atoms join together chemically. |
What is a compound molecule | A compound is a molecule that contains at least two different elements. |
What is a chemical equation? | A chemical equation is symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side |
What is a chemical reaction? | 1.A process that involves rearrangement of the molecular or ionic structure of a substance. |
What are reactants(in a chemical equation)? | substance that takes part in and undergoes change during a reaction |
What is a product(in a chemical equation)? | substances formed in the chemical reaction. |
What is a cofficient(in a chemical equation)? | The number of molecules of reactants or products. |
What is a subscript(in a chemical equation)? | numbers used to tell you how many atoms of an element are present in the equation |