How are the nuclear model and the planetary model of the atom different

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.

Which proportionality applies to avogadro’s law?

Which samples do the atoms have the least kinetic energy