| A | B |
|---|
| pure substances | elements and compounds |
| simplest pure substance | elements |
| 110 | elements |
| pure substance | made u of only one kind of material |
| same throughout | properties of a pure substance |
| atoms | basic building block of matter |
| atoms | smallest particle of an element |
| chemical symbols | shorthand way of writing elements |
| periodic table | universal way to read the elements |
| always capitalized | First letter in an element |
| never capitalized | Second letter in an element |
| subscript | determines the number of atoms per element in a compound |
| coefficient | number in front of a chemical formula |
| atoms | cannot be created or destroyed |
| molecules | simplest part of a compound |
| one | atom count for an element with no subscript |
| molecule | two or more atoms chemically combined |
| compounds | can be broken down into simpler substances |
| Grrek or Latin roots | used when the first letter of an element has been used already |
| same thoguhout | properties of a pure substance |
