Which of the following nonrenewable energy resources is generally the least efficient at producing electrical energy?
a. oil
b. coal
c. natural gas
d. uranium-238

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer