Kassia

If the total number of electrons in the ion [M (H2O) 4] +2 is equal to 50 Whish is the atomic number of M?

During an X-ray examination, a person is exposed to radiation at a rate of 3.17×10-5 grays per second. The exposure time is 0.170 s, and the mass of the exposed tissue is 1.24 kg. Determine the energy absorbed.