What is the mass of a 70gram sample of Francium-206 after 112 seconds if it’s half-life is 16.0 seconds?

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

Ametal with a large number of free flowing electrons most likely has good conductivity

Ithink it’s carbon dioxide

D=m/v =57.9/3 = 19.3 g/cm^3