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PVMS Chemistry Terms
The 50 words you need to know!
| Question | Answer |
|---|---|
| absolute zero | lowest possible temperature; temperature at which particles of matter almost stop moving |
| acid | substance that reacts with metals to release hydrogen |
| alloy | substance made of a mixture of two or more metals |
| atom | smallest part of an element that can be identified as that element |
| atomic mass | total mass of the protons and neutrons in an atom |
| atomic number | number of protons in the nucleus of an atom |
| base | substance formed when metals react with water |
| chemical change | change that produces new substances |
| chemical equation | statement in which chemical formulas are used to describe a chemical reaction |
| chemical formula | way of writing the name of a compound using chemical symbols |
| chemical reaction | process in which new substances with new chemical and physical properties are formed |
| chemical symbols | shorthand way of writing the names of the elements |
| chemistry | study of matter and its reactions |
| coefficient | number that shows how many molecules of a substance are involved in a chemical reaction |
| compound | substance made up of two or more elements chemically combined |
| covalent bond | bond formed when atoms share electrons |
| density | mass per unit volume |
| electron | atomic particle with a negative electric charge |
| elements | simple substances that cannot be broken down into simpler substances |
| family (group) | vertical column of elements in the periodic table |
| indicator | substance that changes color in acids and bases |
| insoluble | not able to dissolve |
| ion | an atom with an electrical charge |
| ionic bond | bond formed between atoms that have gained and lost electrons |
| isotope | atom of an element with the same number of protons but a different number of neutrons |
| mass | amount of matter in an object |
| matter | anything that has mass and takes up space |
| metals | elements that have the properties of luster, ductility, and malleability |
| mixture | two or more substances that have been mixed together but not chemically combined |
| molecule | smallest part of a substance that has all the properties of that substance |
| neutral | neither acidic or basic |
| neutron | atomic particle with neither a negative nor a positive electric charge |
| nonmetals | elements that have none of the properties of metals |
| nucleus | center, or core, of an atom |
| organic compound | compound containing carbon |
| oxidation | chemical reaction in which electrons are lost |
| oxidation number | number of electrons an atom gains, loses, or shares when it forms a chemical bond |
| period | horizontal row of elements in the periodic table |
| periodic | repeating pattern |
| pH scale | measure of the concentration of hydrogen ions or hydroxyl ions in a solution |
| physical change | change that does not produce new substances |
| product | substance that is formed in a chemical reaction |
| proton | atomic particle with a positive electric charge |
| reactant | substance that is changed in a chemical reaction |
| soluble | able to dissolve |
| solute | substance that is dissolved |
| solution | mixture in which one substance is evenly mixed with another substance |
| solvent | substance in which a solute dissolves |
| subscript | number written to the lower right of a chemical symbol |
| valence electrons | electrons in an atom's outer energy level |
Created by:
Ms Potts
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