Common Shortcut Keys. It's hard to remember all the shortcut keys out there. But luckily, most programs adopt conventions (like Ctrl+S, which always saves what you're working on). Even better, programmers typically choose shortcut keys mnemonically (again, like Ctrl+S for Save) to make it easier for us to remember.
This means, that the number of electrons present in an chlorine atom is 17. The energy shells of an atom are in the order K, L, M â¦ So the electronic configuration of chlorine atom is: K, L, M = 2, 8, 7. Valence electrons are the number of electrons present in the outermost shell of an atom. The last shell of a chlorine atom has 7 electrons in it. Therefore, there are 7 valence electrons in an chlorine atom. Here is a video which gives a quick discussion of how to determine how many valence electrons atoms of different elements have.
As the illustration of the chlorine atom above demonstrates, the orbit closest to the chlorine nucleus holds no more than two electrons, and the next two orbits can hold a total of eight electrons each. Importantly, the most stable electron arrangement of any orbit is a full orbit.