(chemistry)
Atomic Sizes
2006-11-19 23:37:24 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
for cations the radii become smaller
for anions the radii become larger
2006-11-19 23:45:42 · answer #1 · answered by The Cheminator 5 · 1⤊ 0⤋
If an ion loses an electron, this means the same number of protons (postive pull) with less electrons (negative pull) to pull on. The protons can pull the electrons in closer because there is less of them.
If an ion gains an electron this means the same number of protons with more electrons to pull on. The protons can't pull as hard on more electrons and the radius becomes larger.
2006-11-20 07:50:32 · answer #2 · answered by yukon_yeti 2 · 1⤊ 0⤋
It decreases as you go across from left to right because Coulombic forces increase with the addition of protons and electrons without occupying another shell. But from top to bottom increases because new shells are being occupied.
2006-11-20 07:54:50 · answer #3 · answered by happyman 3 · 0⤊ 1⤋