If you need 52 grams of potassium to make the glass for an arcadia door, how many atoms of potassium would this be?

8.03x10^23 atoms

Explanation:

From Avogadro's hypothesis, we understood that 1mole of any substance contains 6.02x10^23 atoms.

This means that 1mole of potassium will also contain 6.02x10^23 atoms

1 mole of potassium = 39g

Now we can the above question as follows.

If 1 mole(i.e 39g) of potassium contains 6.02x10^23 atoms, then 52g of potassium will contain

= (52 x 6.02x10^23) /39 = 8.03x10^23 atoms

"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."