Which element indicated by letter in the following periodic table is a gas at room temperature and a pressure of 1.0 atm? 
Definitions:
Financial Futures
Standardized contracts to buy or sell financial instruments or physical commodities for future delivery at an agreed price.
S&P 500 Index
An index tracking the performance of 500 major US companies listed on the stock exchanges.
New York Stock Exchange Index
An indicator that shows the performance of all stocks listed on the New York Stock Exchange.
Wheat Futures
Contracts that specify the future delivery of a certain amount of wheat at a predetermined price.
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