| A yellow, solid, nonmetal element is ____ (brimstone). |
copper (Cu) |
| Bronze is an alloy of mostly ____ mixed with tin (Sn). |
gold (Au) |
| When an electric current is passed through ____ it glows red. |
lithium (Li) |
| The most malleable and ductile metal element is ____. |
neon (Ne) |
| The lightest metal is ____. It is used in rechargeable batteries. |
nitrogen (N) |
| About 78% of the Earth's atmosphere is ____. |
oxygen (O) |
| A dense, radioactive, noble gas is ____. |
radon (Rn) |
| About 21% of the Earth's atmosphere is ____. |
sulfur (S) |
