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science vocab(kiara)
Question | Answer |
---|---|
Law of Consrevation Mass | Mass of products equals the mass of the reactants |
physical change | changes in state or phase |
Chemical Change | Produces a new substance |
Element | Cannot be broken down any more |
Chemical formula | a representation of a substance using symbols for its constituent elements |
Chemical Equation | a 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 | a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei |
Reactants | A substance participating in a chemical reaction, especially a directly reacting substance present at the initiation of the reaction |
Products | The compounds that are formed when a reaction goes to completion |
coefficient | is a number placed in front of a term in a chemical equation to indicate how many molecules (or atoms) take part in the reaction |
Subscript | A subscript in chemistry is used to tell the reader how many of that element there are in a certain compound |