I would go with option #4, reduced use of resources!
:V
The energy required to break one mole of Cl - Cl bond is 242 kJ/mol
Answer:
In chemical bonding: Arrangement of the elements. The horizontal rows of the periodic table are called periods. Each period corresponds to the successive occupation of the orbitals in a valence shell of the atom, with the long periods corresponding to the occupation of the orbitals of a d subshell.
Explanation:
