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Vocab science1
vocab list
| Question | Answer |
|---|---|
| law of conversion notes | states that no matter can be created or destroyed, only changed from one form to another |
| physical change | change in an object's appearance or size |
| chemical change | change in an object's composition |
| element | substance that cannot be broken down into simpler elements |
| chemical formula | way of writing down the properties of a molecule |
| element (diatomic) molecule | molecules composed only of two atoms |
| compound molecule | molecules with more than one different elements in it |
| chemical equation | represents a chemical reaction and its outcomes |
| chemical reaction | the reaction the electrons in an atoms make when a change is done to it |
| reactants | the molecules initially involved on a chemical reaction |
| products | the molecule outcome of a chemical reaction |
| coefficient | the number of molecules in a chemical formula |
| subscript | the amount of atoms of a particular element in a molecule |
| ionic compound | held together by perfect match of electrons in the atoms, like a puzzle put together |
| covalent compound | held together by sharing pairs of electrons between atoms |
| metallic compound | held together by sea of electrons that move freely around each atom |
| synthesis | combining two or more atoms to make a artificial molecule |
| decomposition | analysis or breakdown of a compound into simpler compounds, the opposite of synthesis |
| single replacement | happens when one element is replaced by another in a chemical reaction |
| multiple replacement | happens when two or more elements replace each other in a chemical reaction |