Selenium can be categorized as a noun.
Noun |
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| selenium - a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite) |
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| 1. | noun | Hydrogen, carbon, nitrogen, phosphorus, oxygen, sulfur and selenium are nonmetals. |
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| noun | |
| Hydrogen, carbon, nitrogen, phosphorus, oxygen, sulfur and selenium are nonmetals. | |