a group of students are wandering around a room. when their teacher claps, the students sit down wherever they are.

this situation best models the formation of which type of solid?
1) an amorphous solid because the particles do not have a regular structure
2) an amorphous solid because the motion of the particles stopped
3) a crystalline solid because the moving particles lock into fixed positions
4) a crystalline solid because the particles have a long-range order

Silica, sio2, is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when silicon is exposed to o2 gas at an elevated temperature. at 900˚c, it takes 90 minutes for the oxygen to diffuse from the surface to form a 0.06 micron (0.06 x 10-6 m) thick layer of sio2 on

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Explanation for basic character?