Which of the following sets of elements share the same number of energy levels? A) Ne, Ar, Kr
B) K, Na, H
C) K, Ca, As
D) Si, As, B​

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.