8. A Mg atom differs from a Mg²+ ion in that the atom has a (1) smaller radius (2) larger radius (3) smaller nucleus (4) larger nucleus

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

Compare and contrast the bohr model and the electron cloud models of the atom.

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory