Is a pail of garbage a element ,compound or mixture?

A pail of garbage is a mixture. To figure out how and why it is, you need to understand what each of these things are. If it was an element, it would have a symbol and be on the periodic table of elements. If it was a compound, it would be a mix of two or more elements chemically combined. The reason it's a mixture is because there is no symbol for it, and you can PHYSICALLY separate it. Hope that makes sense! :)

"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."