According to the electron configuration, which atom will be the most reactive?

The number at the end of an isotope’s name is the number.

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions