What are families 3-12 on the periodic table called

What neutral atom is isoelectronic to mn+4

An experimental procedure requires a 10 ml of acid to be dissolved

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