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Are selenium and astatine metalloids or non-metals???
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Hello,
Selenium is a semi-metal and Astat is a non-metal, in my opinion. Thus it stands at least in the period system
I hope that was helpful.
Thank you.
because our chemistry teacher knew it himself and gave us this as a homework haha
Astat is a halogen having partly metallic properties and is therefore also calculated from some of the semimetals. Astat is the rarest naturally occurring element of the earth. There are many isotopes with half-life tines 0.0001 sec and 5.41 h .
Depending on the modification, selenium is a nonmetal or a semimetal.