What occurs in order to break the bond in a cl2 molecule? explanation .

Options for the question;

(1) Energy is absorbed.

(2) Energy is released.

(3) The molecule creates energy.

(4) The molecule destroys energy.

(1) Energy is absorbed.

Explanation:

Using the Method of elimination;

Option 1 - Energy is absorbed to break bonds. Bond-breaking is an endothermic process. This means this option is correct.

Option 2 - This option is incorrect because bond breaking is endothermic in nature. Energy is being absorbed and not released.

Option 3 and 4 - These optons are wrong because energy can neither be created nor destroyed but can change from one form to another.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."