The energy from radiation can be used to cause the rupture of chemical bonds. a minimum energy of 242 kj/mol is required to break the chlorine–chlorine bond in cl2. determine the longest wavelength of radiation that possesses the energy to break the bond.

The longest wavelength of radiation is 494.6 nm that will possess the energy to break the bond.

Explanation:

Energy required to break 1 mol of Cl-Cl bond = 242 kJ =242000 J

1kJ = 1000 J

1 mol = atoms/particles/ molecules

Energy required to break 1 of Cl-Cl bond = E

Wave length of the radiation with energy E.

h = Planck's constant

c = speed of the light

The longest wavelength of radiation is 494.6 nm that will possess the energy to break the bond.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.