can you state one property of this volcanic substance you mentioned in the first?
UNANSWERABLE
substances formed from atoms of teo or more elements are called UNANSWERABLE what does this metal substance refers to? A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals. is it compared to the last two things you mentioned in your answer? UNANSWERABLE where is it applied? Carbon, aluminum, selenium, polonium, and astatine. is it used in making glass? Yes - They and their compounds are used in alloys, biological agents, catalysts, flame retardants, glasses, optical storage and optoelectronics, pyrotechnics, semiconductors, and electronics. in what way does the fifth mentioned thing occurs in nature? Obsidian is a common volcanic glass with high silica (SiO2) content formed when felsic lava extruded from a volcano cools rapidly. Impactite is a form of glass formed by the impact of a meteorite, where Moldavite (found in central and eastern Europe), and Libyan desert glass.
wiki:25675817
Obsidian [SEP] Origin and properties
The translation into English of "Natural History" by Pliny the Elder of Rome includes a few sentences about a volcanic glass called obsidian ("lapis obsidianus"), discovered in Ethiopia by Obsidius, a Roman explorer. Obsidian is formed from quickly cooled lava, which is the parent material. Extrusive formation of obsidian may occur when felsic lava cools rapidly at the edges of a felsic lava flow or volcanic dome, or when lava cools during sudden contact with water or air. Intrusive formation of obsidian may occur when felsic lava cools along the edges of a dike. Tektites were once thought by many to be obsidian produced by lunar volcanic eruptions, though few scientists now adhere to this hypothesis.