Which of the following contains chemical energy? a.) atoms that in motion b.) the nucleus of an atom c.) a bond between two atoms d.) the electrons of an atom

Correct option is C.

Explanation: Chemical energy is the energy which is related to the chemical bonds of atoms and molecules. It is released in the chemical reaction.

Option A is related to the kinetic energy of the atom because the atom is in motion.

Option B is related to the nuclear energy of the atom as it is explaining about the nucleus of the atom.

Option C is related to the chemical energy of the molecule as there is the formation of a bond between two atoms.

Option D is related to the kinetic energy of the atom as we know that the electrons are in constant motion.

"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."

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