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In the modern periodic table, each element is represented by its symbol. The number above each symbol is its atomic number. Atomic numbers increase from left to right and from top to bottom in the table.
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In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)
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