Shreyans Bhansali · Ernest Z. · Ramith Hettiarachchi · Christopher P. · dwayne

The electron configuration of chlorine is #1s^2 2s^2 2p^6 3s^2 3p^5# or #""3s^2 3p^5#.

You are watching: The number of electrons in a chloride ion, cl-, is

The #3s^2 3p^5# electrons are the outermost electrons, therefore chlorine has actually seven valence electrons.

In a picture, the valence electrons space the ones in the outermost shell.

You have the right to see in the diagram listed below that there are 7 electrons in the outermost circle. Additionally, a much more basic way of identify the number of valence electrons would be to just look in ~ what team Cl is in.

It is in group 17, which way it has actually 7 valence electrons.  Shivangi Mangotra
Oct 27, 2014

Chlorine has an atom number 17. Atom number is the variety of protons current in the nucleus of an atom. Every the atoms of an facet have very same atomic number. In every stable atom the number of electrons is equal to the number of protons. Therefore, the variety of electrons is equal to the number of protons in an chlorine atom. This means, the the variety of electrons present in an chlorine atom is 17.

The electronic configuration of chlorine atom is:-E.C - K together M 2 8 7Where k, l, ,m room the shells/orbits/ energy levels of an chlorine atom.

Valence electrons room the number of electrons current in the outermost shell of an atom. Now, the last covering of chlorine atom has actually 7 electrons in it. Therefore, there are 7 valence electrons present in one chlorine atom.

Here, stable method that atom has actually not created a ion yet.  Ernest Z. · mrpauller.weebly.com
Oct 27, 2014

Chlorine has seven valence electrons.

Chlorine has atomic number 17.

The atom number is the variety of protons existing in the nucleus of one atom.All the atom of an facet have very same atomic number.

In every stable atom the number of electrons is equal to the variety of protons. Stable way that atom has not created a ion yet.

Therefore, the variety of electrons is equal to the variety of protons in one chlorine atom.

This means, the the variety of electrons existing in an chlorine atom is 17.

The power shells of one atom room in the stimulate K, L, M …

So the digital configuration of chlorine atom is: K, L, M = 2, 8, 7

Valence electrons space the number of electrons present in the outermost covering of an atom.

The last shell of a chlorine atom has actually 7 electrons in it.

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Therefore, there room 7 valence electron in one chlorine atom.

Here is a video which provides a quick conversation of just how to recognize how many valence electrons atoms of different elements have.Video from: Noel Pauller 