2007-03-01 10:59:16 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Chlorine is number 17 on the periodic table, so a chlorine atom has 17 protons and 17 electrons. The electrons are arranged: 2, 8, 7. That last level needs one more electron to have a full level, so it gains an electron from some other atom. That makes it a chlorine ion with a negative charge.
2007-03-01 11:08:21 · answer #1 · answered by ecolink 7 · 0⤊ 0⤋
Chlorine becomes a mononegative ion (Cl-) by gaining an electron. Atoms like to have their last/most external orbital (valence) completely full (8 electrons). Cl has 7, thus achieving this goal by capturing one more.
2007-03-01 19:06:51 · answer #2 · answered by Butterfly 2 · 0⤊ 0⤋
Chlorine gains an electron, forming the chloride (Cl-) anion.
2007-03-01 19:04:25 · answer #3 · answered by nazzyonenine 3 · 1⤊ 0⤋
Cl-
2007-03-01 19:24:44 · answer #4 · answered by burninhotboi 2 · 0⤊ 0⤋