Identify the strongest attractive force present in the pure substances shown

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table