On the periodic table, which groups of elemen tend to positive ions? A. Group 1 and Group 2 B. Group 16 and Group 17 C. Group and Group 14 Group 16 and Group18

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

A2-kg bowling ball is 1 meter off the ground on a post when it falls. just before it reaches the ground,its traveling 4.4 m/s. assuming that there is no air resistant, which statement is true a. the initial potential energy is less then the final kinetic energy b. the mechanical energy is not conserved c. the mechanical energy is conserved d. the initial potential energy is greater than the final kinetic energy