Families or of elements are similar in their number of valence electrons

Arescue plane flying horizontally at spots a survivor in the ocean directly below and releases an emergency kit with a parachute. because of the shape of the parachute, it experiences insignificant horizontal air resistance. if the kit descends with a constant vertical acceleration of, how far away from the survivor will it hit the waves?

What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.

What is the fate of the electrons that interact with a specimen in an electron microscope?