In chemical reactions, all electrons rearrange around the nuclei.
举一反三
- All chemical reactions in the body are catalyzed by enzymes. A: 正确 B: 错误
- The changes of chemical reactions include:
- Two electrons(电子) will be repelled from each other and so will two nuclei(原子核).
- In the fusion reaction of elements formed in the universe, carbon nuclei can be directly generated from helium nuclei. A: 正确 B: 错误
- Over 100,000 chemical reactions _____ the brain every second.