Which of the following elements will likely form a negative ion in its ionic compounds? a. li, lithium c. mg, magnesium b. al, aluminum d. cl, chlorine

The answer would be C) Mg, magnesium.

Mg, magnesium will likely form a negative ion in its ionic compounds.

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.

The object's initial distance above the groundthe object's initial velocity