Use particle theory to explain why the shape of a piece of metal in its solid state does not change when you press it hard.

When something (a piece of metal, in this case) is in it’s solid state, the particles are packed together to help it hold its shape, therefore it won’t easily bend. If it was melted into a liquid state, the particles would be allowed to move around freely, because liquid matter is made up of more loosely packed particles.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

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