Question | Answer |
1.Law of conservation of mass | States that mass is neither created nor destroyed in any ordinary chemical reaction. |
2.physical change | A physical change does not produce a new substance. |
3.chemical change | A chemical change produces a new substance. |
4.Element | substance that cannot be broken down into simpler substances. |
5.chemical formula | type and quantity of atoms and molecules that are present. |
6.Element molecule | molecule of one type of atom. |
7.compound molecule | made of more than 1 type of atom. |
8.chemical equation | shorthand form for writing what reactants are used and what products are formed in a chemical reaction;sometimes shows whether energy is produced or absorbed. |
9.chemical reaction | process that produces chemical change , resulting in new substances that have properties different from those of the original substances. |
10.reactants(in a chemical equation) | substances that exists before a chemical reaction begins. |
11.products(in a chemical equation) | substances that forms as a result of a chemical reaction. |
12.coefficent(in a chemical equation) | The number of molecules of reactants or products. |
13.subscription(in a chemical equation) | tells the number of atoms in one molecule. |
14.Diatomic | having two atoms in the molecule. |