2. An element exists and different isotopes, 4.35% have a mass of 49.9461 amu, 83.79% have a mass of 51.9405 amu. 9.50% have a mass of $2.9407 amu, and
2 30% have a mass of 53.9380 amu.

what is the atomic mass? what is

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.