SOMEONE PLZ HELP ME WITH THIS?!?!?

Table 1:

17 protons and 17 electrons

78 protons and 78 electrons

32 protons and 18 electrons

38 protons and 36 electrons

13 protons and 13 electrons

15 protons and 18 electrons

14 protons and 14 electrons

Table 2:

Ba2+ ion

Radon

Polonium

Tin

Selenium

Cesium

Magnesium Ion

IT WAS SUPER TOUGH!!!

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse