1. Electron Configuration:
* Chlorine has an atomic number of 17, meaning it has 17 protons and 17 electrons.
* The electron configuration for chlorine is 2, 8, 7.
2. Understanding Electron Shells:
* First Ring (n=1): Holds a maximum of 2 electrons.
* Second Ring (n=2): Holds a maximum of 8 electrons.
* Third Ring (n=3): Holds a maximum of 18 electrons.
3. Finding the Electrons in the Third Ring:
* From the electron configuration, we see that the first two rings are completely filled (2 + 8 = 10 electrons).
* The remaining 7 electrons (17 total - 10 filled) reside in the third ring.
Therefore, there are 7 electrons in the third ring of a chlorine atom.
