For most substances, the representative particle, or smallest unit in which the substance naturally exists, is the HELP

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

Ithinks its false. tell me if im wrong

Its strengthits conductivity of heat and electricity its shiny colourmalleable and ductility

The formula is (nh4)2co3