Which of the following elements are found in the same period? a) Cu and Fe
Ob) Cl and Kr
Oc) C and AI
d) B and Ga
e) Mg and Rb

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)