| A | B |
|---|
| protons, electrons and neutrons | 3 parts of an atom |
| atomic number | The number of protons in an atom is equal to the |
| metals | The majority of elements on the periodic table are called |
| heterogeneous | A salad is and example of a ____ mixture. |
| isotopes | Two atoms that have the same number of protons but different number of neutrons. |
| compound | The new substance formed when elements combine chemically is called a |
| element | A type of matter that contains only one type of atom is an |
| homogeneous | a ____ mixture is somtimes difficult to distinguish from a compound |
| mixture | when 2 or more substances come together but DO NOT combined chemically |
| sulfur | S |
| chlorine | Cl |
| nitrogen | N |
| oxygen | O |
| sodium | Na |
| carbon | C |
| hydrogen | H |
| helium | He |
| lithium | Li |
| glucose | C6H12O6 |
| carbon dioxide | CO2 |
