| A | B |
|---|
| atom | smallest part of an element |
| chemical symbol | shorthand way of writing the name of an element. |
| element | substance made up of only one kind of atom |
| compound | substance made up of two or more elements that are chemically combined |
| molecule | smallest part of a substance that has all the chemical properties of that substance |
| properties | features that describe objects |
| Chemical symbol of nitrogen | N |
| Chemical symbol of iron | Fe |
| Chemical symbol of hydrogen | H |
| Water | H2O |
| table salt | NaCl |
| Oxygen and Helium at room temperature are_______. | solids |
| Marie Curie studied ______ | radioactive elements |
| chemical formula | shorthand way of writing the name of a compound |
| subscripts | numbers in a chemical formula that show the relative amounts of the elements in a compound. |
| The number of atoms in H20 is | 2 atoms of hydrogen and 1 atom of oxygen |
| mineral | natural solid formed from elements and compounds in the earth's crust. |
| 75 % of the earth's crust is made up of what? | oxygen and silicon |
| A mineral can be an element of what? | an atom |
| Chemical formula for Gold | Au |
| chemical formula for silver | Ag |
| This mineral contains 3 elements that are chemically combined. | Calcite |
| Most rock-forming minerals are ________. | compounds |
| Chemical formula for copper | Cu |
