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FellowrootBest ResponseYou've already chosen the best response.1
This is what I'm thinking. Xe, Rn and Kr are all noble gases. That are non reactive. Their outer shell of electrons are full. They have a complete octet, but Ag is not and we know silver clumps together and it can share its electrons. So I say Ag is the answer.
 one year ago

Carl_PhamBest ResponseYou've already chosen the best response.1
Ag (silver) is the answer, because the conditions stated are 1 atm pressure and room temperature (25 C). At that temperature and pressure all the other substances are gases, and the pictures shows a solid.
 one year ago

GrazesBest ResponseYou've already chosen the best response.1
It was because of the temperature and the part about being a solid. Thanks!
 one year ago
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