Using the periodic table to predict properties of the main group elements, choose all of the statement that are correct.

The left side of the periodic table tends to be more malleable and ductile than the right side.
Group 17 is the most reactive group of nonmetals.
Group 1 is the most reactive group of metals.
Groups 1 and 2 are liquids at room temperature.
the main group elements contain only metals and nonmetals.

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.