Suppose that a different student obtained reaction rates for the particle-size experiment, and that
these rates did not show a pattern. Check all
possible sources of this error.
O Some of the broken tablet was not added to
the water
The tablet was not crushed enough to make
a substantial difference.
The size of the reaction beaker was varied.
The tablets were not uniform in their mass.

"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."

2b2t

explanation:

2b2t