Two students are trying to figure out an unknown substance. The mass of their substance is 0.006g and the volume is 3ml. They conclude that it is Helium. Are they
correct? Show your work and explain your answer!

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