Radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. the electron and neutrino are emitted at right angles and have momenta of 9.6 ×10–23kg • m/s and 6.2 ×10–23kg • m/s, respectively. determine the magnitude and the direction of the momentum of the second (recoiling) nucleus.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

the answer for sodium is 0.186

the answer for rubidium is 0.251

fe 55.85 g/mol and h2o 18.02 g/mol.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.