The standard table of elements lists 92from hydrogen, the lightest element, to uranium, the heaviest. An atom of hydrogen has one positive charge on the nucleus and one planetary electron; uranium has a positive nuclear charge of 92, and 92 attendant electrons. The existence of all these elements has been well established, except for Nos. 85 and 87 (alabamine and virginium), whose discovery has been claimed by various investigators but not yet certainly confirmed. The existence of elements heavier than uranium is theoretically possible. In fact, such heavy elements of higher numbers than...
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