What is the number of electrons in a chloride atom cl- ?
2007-03-26 17:54:32 · 5 answers · asked by Rachel r 2 in Science & Mathematics ➔ Chemistry
Chlorine’s atomic number is 17, meaning that it has 17 protons in the nucleus.
A neutral Chlorine atom has the same number of electrons around the nucleus as there are protons in the nucleus.
So a Chlorine atom has 17 electrons.
A Chloride ion (Cl-) has gained an extra electron as it was reduced (Gain electron - Reduction). The Chloride ion has 1 more electron than the Chlorine atom = 1 + 17.
The Chloride ion has 18 electrons around the nucleus.
http://www.webelements.com/webelements/elements/text/Cl/key.html
2007-03-26 18:00:06 · answer #1 · answered by mrjeffy321 7 · 0⤊ 0⤋
there would we chloride ion not atom .
if in chlorine atom the no of electrons is 17 , 1electron less than the octate.
in chloride ion i.e (cl-) it would gain 1 electron and fullfil its octate there fore the cl- ion has 18 electrons.
2007-03-27 01:57:31 · answer #2 · answered by shiva M 1 · 0⤊ 0⤋
18
2007-03-27 00:58:41 · answer #3 · answered by Anonymous · 1⤊ 1⤋
CL-
is isoelectric with argon
because it has equal electrons as argon's which is 18
the e- configuration of Cl-
is
1s^2
2s^2 2p^6
3s^2 3P^6
and
it has 8 valence electrons
2007-03-27 01:05:16 · answer #4 · answered by MAHAL 2 · 0⤊ 0⤋
18
and that is an ion of Cl- not an atom!
2007-03-27 00:58:29 · answer #5 · answered by smarties 6 · 1⤊ 1⤋