神马作文网关于原子直径和离子直径,到底怎么看它们的变大变小?附题,坐等
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关于原子直径和离子直径,到底怎么看它们的变大变小?附题,坐等
1.what is the oxidation number for zinc?
2.how does zinc's electron configuration acount for this oxidation number?
3.what factor contributes to the difference in reactivity between potassium and cesium?which element is more reactive?
4.using the periodic table as a g,uide,list the following ions in order of increasing ionic radius.Na＋,Cl-,S2-,F-,Al3+,Se2-
1.what is the oxidation number for zinc?
2.how does zinc's electron configuration acount for this oxidation number?
3.what factor contributes to the difference in reactivity between potassium and cesium?which element is more reactive?
4.using the periodic table as a g,uide,list the following ions in order of increasing ionic radius.Na＋,Cl-,S2-,F-,Al3+,Se2-
简单的说,原子：同周期,核电荷大的半径小,同主族,周期大的大.离子：同样的电子结构,比如都是288,核电荷大的半径小,；若层数不同,层数多的半径大.
Cl- 288 < S2- 288,,F-28>Na+ 28> Al3+ 28,Se2-四层电子最大.
所以由小到大应该是：Al3+ < Na+ < F-
Cl- 288 < S2- 288,,F-28>Na+ 28> Al3+ 28,Se2-四层电子最大.
所以由小到大应该是：Al3+ < Na+ < F-