| Answer | Crossword Clue |
|---|---|
| IRON | Common element. |
| SILICON | Common element |
| ALUMINOUS | Of a common metallic element |
| IRON | Most common element on Earth, by mass |
| SILICIC | Pertaining to the second most common element in the Earth's crust |
| phosphorus | The chemical element of atomic number 15, a poisonous, combustible nonmetal that exists in two common allotropic forms, white phosphorus, a yellowish waxy solid that ignites spontaneously in air and glows in the dark, and red phosphorus, a less reactive form used in making matches |
