Irene Curie and Frederic Joliott bombarded aluminum-27 with an ionized helium-4 cation(an alpha particle) yielding a neutron and an isotope. One of the end products was the antimatter of the electron. What is the name of the antimatter of the electron?

A. Position
B. Negitron
C. Proton
D. Nucleus
E. Antielectron

"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."

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

a electronegativity decreases beacuse the size of nucleus is bigger.

the answer is 75.0%.