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Question | Answer |
---|---|
chemical change | a chemical reaction; a process that changes substances into new substances (related word: chemical reaction) |
chemical | an element or compound |
chemical reaction | a chemical change; a process that changes substances into new substances (related word: chemical change) |
matter | material that has mass and takes up some amount of space |
molecule | two or more atoms joined together |
element | a pure substance that cannot be broken down into simpler substances by chemical reactions |