1) os-182 has a half-life of 21.5 hours. how many grams of a 10 g sample would have decayed after
exactly three half-lives?

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

Ithink that the answer is b