The metals in groups 1a, 2a, and 3a
a) all have ions with a 1+ charge c. all form ions with a negative charge
b. gain electrons when they form ions d. lose electrons when they form ions

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas

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)