"Call Teacher Bai and I'll tell you." Haitang deliberately lied.
"Teacher Fang in our family has educated me for more than 20 years, and for the rest of my life, I have been educated by you, Teacher Bai, for more than 20 years. What kind of fate do I have? I just cannot be an adequate student. Teacher Bai, Teacher Bai, please give me your instructions."
." Lao Bai twisted his eyebrows.
"Okay, let me tell you, the secret lies in the ice. This ice is not made of ordinary water, but heavy water frozen into heavy ice." Haitang said.
"Ah, no wonder! It's just that these ice cubes are inedible! I know!" Lao Bai suddenly thought of it.
There are many terms that cannot be understood literally. For example, red quark is not red, and nanometer is not a meter, but a unit of length. However, heavy water is exactly as its name suggests, and it is indeed water heavier than ordinary water.
Elements exist in several different forms, or isotopes. They are composed of the same number of protons and electrons, which determine the chemical properties of the element, but the number of neutrons is different. In addition to increasing the weight, the number of neutrons has an impact on the element's properties.
Chemical properties are not affected at all.
A hydrogen atom always contains one proton and one electron, but one in every 6,400 hydrogen atoms contains an additional neutron, which doubles the atom's mass.
Through a complex process involving hydrogen sulfide, heavy hydrogen can be separated, thus producing heavy water that is about 10% heavier than ordinary water.
Of course, you can also get it directly from the laboratory.
Heavy water is real water, mainly used in nuclear reactors, but it itself is not radioactive. It is very safe, but it is not recommended to drink it...
"I really have two teachers in my family. It looks like my cooking journey will be very long." Lao Bai said thinking.
This kind of gadget is very interesting. You can joke with familiar guests after dinner to increase your sense of humor.
As long as the other person is not a scientist or a student of chemistry, they generally won’t know.
"Lao Bai, if you are good to me, I will teach you how to make a metal spoon melt in ordinary warm water next time." Haitang gave a few sweet dates, which made Lao Tian feel itchy.
How proud and unique it would be to show this off in front of guests.
"I'm not treating you well. I'll let you use my bank card as you please. If Teacher Fang doesn't support you in the future, Lao Bai will definitely be on your side, okay?" Lao Bai said.
"Deal." She high-fived her father.
The sound of the door opening.
"Hi, my husband, my daughter, I'm back." Fang Rong's voice.
"My dear mother, have you gone to find a store or go shopping..." Haitang could hardly lift her large and small bags when she saw them.
"My dear wife, my bank card..." Lao Bai said distressedly.
"When I make money, I will repay you double the money. This is called cost investment. To do big things, you have to take risks. Besides, the total of these is less than 10,000 yuan." Fang Rong didn't care.
"Oh my god, ten thousand yuan. I thought it was just a few hundred yuan. It's just some cloth and some groceries." Lao Bai took a look at it in confusion and felt that those things were almost the same.
This is where men and women are always different.
"This is fashion." Fang Rong took out these things and placed them on the bed one by one.
"Why don't you just search for pictures of these online? Why do you have to buy them?" Lao Bai still worried about money.
"I can't wear what I put on..." Fangrong said embarrassedly.