The isotope Cesium-137, which has a half-life of 30 years, is a product of nuclear power plants. How long will it take for this isotope to decay to about one-sixteenth its original amount?

The answer to your question is 120 years

Explanation:

Data

half-life = 30 years

decay of 1/16

Process

1. Do a chart to solve this problem

Every 30 years the amount of Cesium is half the previous amount.

                       Amount of Cesium-137          Time (years)

                                       x                                  0

                                       x/2                               30

                                       x/2/2 = x/4                   30

                                       x/4/2 = x/8                   30

                                       x/8/2 = x/16                  30

Total time = 30 + 30 + 30 + 30 or 4 x 30 = 120 years

chemists can use the electron cloud model to assign electrons to different atomic orbitals. atomic orbitals also explain the patterns in the periodic table

explanation:

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.