the atomic number of calcium is 20 . the maximum possible numbers of electron in m-shell is a 2 b 8 c 18 d 10​

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.

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane