1. The beauty of science lies mainly in confusing people
2. Sun Houhou was pinned down at the foot of Wuzhi Mountain and his master rescued him. He said: "Master, go further, further, further."... So he is the most energetic person in the world
3. NH4Cl is heated to form NH3 to produce NH3 and HCl. NH3 and HCl react easily at room temperature, and they combine again when they are too cold at high altitudes
4. There is no luck in learning chemistry, it's just reading over and over again
5. Those who have big problems are adults, those who have small problems are villains, and those who have no problems are not human beings, so we all have problems
6. Why is carbon dioxide combined with oxygen? Why not carbon pentoxide? Why aren't you carbon pentoxide?
7. Play it first, play it, and it's really over
8. Looking at the cycle horizontally and looking at the family vertically, they are all metals and non-metals
9. We now advocate fluorine-free and prohibit the use of fluorine-free refrigerators
10. Could it be that this C-H bond can be replaced, but that C-H bond is the son of a bitch and cannot be replaced?
