Just one. To become stable, it needs eight electrons; a full outer shell.
The electronic configuration of chlorine is 2,8,7 So there are 7 electrons in the valence shell (or highest energy level).
7
Chlorine has three electron shells with 2, 8, 7 electrons.
The chloride ion (Cl-) has 8 electrons on the outermost energy level.
3.
Chlorine has 7 valence electrons.
The electronic arrangement of chlorine is 2, 8, 7. This means that chlorine has 2 electrons in its first energy level, 8 electrons in its second energy level, and 7 electrons in its outermost energy level.
Chlorine is in the 17th period.Elements in the 17th period have 7 electrons in the outermost energy level. So chlorine has 7 electrons in the 3rd energy level.Chlorine has 17 electrons. It's electron configuration is [Ne] 3s2 3p5. Therefore it has 7 electrons in its third (outermost) energy level.
The electronic configuration of chlorine is 2,8,7 So there are 7 electrons in the valence shell (or highest energy level).
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
There are 3 energy levels in chlorine. Look at the shell notation: 2-8-7. So there are 8 electrons in the highest energy level.
7
Answer3 energy levels17 protons and electrons
Chlorine has three electron shells with 2, 8, 7 electrons.
The second energy level contains eight valance electrons when it's full.
There are eight electrons in the outermost energy level of a chloride ion.
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