Afictitious element z has an average atomic mass of 223.06 u.223.06 u. element z has two naturally occuring isotopes. the more abundant isotope has an exact mass of 223.95 u223.95 u and a relative abundance of 65.51%.65.51%. calculate the exact mass of the second isotope.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

The answer is bhope this