Statement 1: Radon (Rn) is an elemental gas (noble gas) with an atomic weight of approximately 222 g/ mol. Among the elemental gases at standard conditions, it is the heaviest. Statement 2: Astatine (At) is a highly radioactive element and is one of the rarest naturally occurring elements on Earth's crust. It is primarily found as a transient product of radioactive decay. Statement 3: Graphite is a well-known and stable allotrope of carbon, characterized by its layered structure.
Consider the following statements: Radon is the heaviest gas. Astatine is a rarer element on Earth. Graphite is an allotrope of carbon. Which among the above statement(s) is/are correct ?
Asked in PPSC CS Prelims 2015 · Topic: Non-metals (Carbon and its Allotropes (Diamond, Graphite, Fullerenes, Graphene))
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