The gases listed are at standard temperature and pressure
• 1 mol of Co, gas
• 1 mol of N, gas
• 2 mol of O, gas
Which statement is correct?
The volume of 1 mol of Co, is greater than that of more
The volume of 1 mol of Co, is greater than that of moto
The volumes of 2 mol of O, and 1 moto goes are the same
The volumes of 1 mol of Co, and 1 mol of Ne gases are the same

"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."