Chem QuizStart Game

Which is a Noble gas?

Which is a synthetic element?

Which is liquid at room tempature?

Which element is radioactive?

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Argon (Ag)Atomic Number: 18Atomic Mass: 39.948Argon is a noble gas because its outer shell of valence electrons is "full". A "full" outer shell makes an element very stable/not very reactive because it is unlikely to take/give up electrons.Correct!Next

Plutonium (Pu)Atomic Number: 94Atomic Mass: 244Plutonium is a radioactive element because it does not have a stable electron configuration. The further from a "full" outer shell of valence electrons/the larger an element is, the more likely it is to be radioactive.Correct!Next

Oganesson (Og)Atomic Number: 118Atomic Mass: 295.216Oganesson is a synthetic element because it was made in a lab and is not naturally occurring in nature. Only a few atoms of Oganesson have ever been CreatedCorrect!Next

Mercury (Hg)Atomic Number: 80Atomic Mass: 200.592Mercury is one of two elements, and the only metal, that is a liquid at room temperature (20-25 degrees Celsius). The other element is bromine, a halogen.Correct!Next

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