| A | B |
|---|
| atom | building blocks of matter |
| molecules | small groups of atoms |
| base | compound with pH > 7 |
| acid | compound with pH < 7 |
| chemical reaction | produces new substance |
| periodic table | organized chart of elements |
| neutrons | neutral particle in nucleus of atom |
| protons | positively charged particle in nucleus |
| electron | negatively charged particle in nucleus |
| nucleus | center of atom that contains protons & neutrons |
| atomic mass | total sum of protons & neutrons in a element |
| atomic number | total number of protons in an element |
| leptons | make up electrons |
| quarks | make up protons & neutrons |
| salt | compound produced by an acid + a base |
| chemical formula | represents a molecule or a compound |
| chemical reaction | a chemical change |
| chemical equation | represents a chemical reaction |
| orbit | path of an electron spinning around the nucleus |
| compound | groups of 2 or more elements chemically combined |
| ion | positively or negatively charged atom |
| litmus | paper indicator used to detect acids & bases |
| indicator | substance used to test for acids, bases, starches,etc. |
| pH scale | numbers from 1 to 14 to show strength of acids & bases |
| subscript | tell # of atoms of an element found in a chemical formula |
| chemical property | characteristic of matter that describes how a substance will react with something else |
| chemical change | reaction that creates a totally new substancee |
| physical property | characteristic that describes the appearance or state of matter of a substance |
| physical change | reaction that does not change the chemical make-up of a substance |
| symbol | represents the name of an element |
| neutralization reaction | acid + base -> salt + water |
| neutral | having no charge |
| mixture | substances that are not chemically combined |
| isotope | atoms of an element with different # of neutrons |
| product | produced in a chemical reaction |
| Law of Conservation of Matter & Energy | matter & energy cannot be created nor destroyed in a chemical reaction |
