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.
An atom of chlorine has 17 electrons. These electrons are negatively charged and are arranged in orbits around the nucleus of the chlorine atom. The nucleus has 17 positively charged protons. The electronic configuration of the chlorine atom is 2, 8, 7; this means that the first orbit has a complete set of two electrons, the second orbit has a complete set of eight electrons, and the third orbit has an incomplete set of seven electrons. The chlorine atom needs one more electron to complete this orbit with eight electrons. This gives chlorine a valence of 1 for chemical reactivity. The atomic number of chlorine is 17. Learn more about Atoms & Molecules