Grinding solid colorless phenolphthalein indicator and solid colorless magnesium hydroxide base can produce a reaction that causes the mixture to turn pink.
Regularly dimpled trays such as those used in food packaging can be used to represent layers of atoms in solid structures. For example, the square array of dimples in transparent plastic mini quiche trays can be used to depict layers within cubic or tetragonal unit cells. Multiple solid structures and ways to represent those structures are described.
As the raft of bubbles is stressed with the slider, dislocations move into and out of the grains and their boundaries.
Liquid ethanol is poured into a saturated calcium acetate solution and a solid gel is formed. The gel burns like canned heat (Sterno™).
When the beta form of mercury(II) iodide cools to below the transition temperature of 126°C, it returns to the red/orange alpha form.
An animation illustrates how peeling occurs between layers where bonding is weak in molybdenum disulfide.
A metal bobby pin is heated until red hot, then allowed to cool slowly; this process is called annealing. The annealed bobby pin is very flexible.
An atomic-level simulation shows what happens to the metal bobby pin during the annealing process.
The tempering process, which involves heating a hardened bobby pin then cooling slowly, transforms the brittle metal into springy metal.
An atomic-level simulation shows what happens to the metal bobby pin during the hardening process.
