Is Meshuggah considered thrash metal?

metals that do not react readily are known as inactive metals

Yes they are! even though they are very soft, reactive and not as widely used as much as transition metals eg. in construction they still have other metallic properties, such as metallic bonding.

metalloids are neither metals nor non-metals......... they show properties intermediate between both metals and non-metals.

Chromium is a half metal: Cr(III) oxide is basic Cr2O3 forming Cr3+ ions in acid solution. and Cr(VI) oxide is acidic, forming chromate CrO42- and bichromate Cr2O72- ions

Not at all,actually thrash is has come back,but is dying again.History repeats itself..as does music. It also depends where you live. For example there are still many thrash band playing and even...