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An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have
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Which sample at stp has the same number of atoms as 18 liters of ne at stp
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Which diagram represents the phase tha occurs after a solid melts?
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How much CO2 is produced from 10g of CH4?...
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