chemistry electronic structure问题！！！

plouffle0789

An element M forms negative ions and has one chloride only.WHich of the following shows the electron configuration of M?

答案是：1S2 2S2 2P3


我不明白。谁可以告诉我怎样算到的？

Lov瑜瑜4ever

form 1 chloride ion而已就代表M是period2的element。。
能form -ve ion的有N,O,F。。
O和F不form chloride compound。。
所以只剩下N( 1s2 2s2 2p3)

plouffle0789

回复 2# Lov瑜瑜4ever



你好厉害哦！


    The outermost electron configurations of elements x and y are ns1np4 and ns2np5 respectively.Which of the following pairs represent the formula and the type of bonds formed by elements?


ans:xy2,covalent

这题呢？

Lov瑜瑜4ever

回复  Lov瑜瑜4ever



你好厉害哦！


    The outermost electron configurations of elements x ...
plouffle0789 发表于 12-9-2011 09:44 PM

ns1np4 or ns2np4 o?

plouffle0789

回复 4# Lov瑜瑜4ever


    是 ns2np4,写错了！！

不过我已经知道怎样做了。
这样对吗？

The outermost electron configuration of element X is ns2np4 means that the element X has 6 valence electrons and is non-metal.Whereas,on the other hand,the outermost electron configuration of element Y is ns2np5 means that the element Y has 7 valence electrons and is non-metal.So,in conclusion,one X atom will share two of its valence electrons with one electron from each of the two Y atoms to form two single covalent bonds.The chemical formula of the newly-formed compound is XY2.The shape of this compound is V-shaped(Bent shaped).

form 1 chloride ion而已就代表M是period2的element。。
能form -ve ion的有N,O,F。。
O和F不form chloride compound。。
所以只剩下N( 1s2 2s2 2p3)

form 1 chloride ion而已就代表M是period2的element。。--几时学的？我找书本找不到，请告诉我是那一课的。
form 1 chloride ion而已就代表M是period2的element。。回复 4# Lov瑜瑜4ever


    是 ns2np4,写错了！！

不过我已经知道怎样做了。
这样对吗？

The outermost electron configuration of element X is ns2np4 means that the element X has 6 valence electrons and is non-metal.Whereas,on the other hand,the outermost electron configuration of element Y is ns2np5 means that the element Y has 7 valence electrons and is non-metal.So,in conclusion,one X atom will share two of its valence electrons with one electron from each of the two Y atoms to form two single covalent bonds.The chemical formula of the newly-formed compound is XY2.The shape of this compound is V-shaped(Bent shaped).

form 1 chloride ion而已就代表M是period2的element。。
能form -ve ion的有N,O,F。。
O和F不可以form chloride compound。。
所以只剩下N( 1s2 2s2 2p3)

form 1 chloride ion而已就代表M是period2的element。。--几时学的？我找书本找不到，请告诉我是那一课的。
form 1 chloride ion而已就代表M是period2的element。。O和F（TWO OF THE ELEMENTS OF PERIOD 2）不可以form chloride compound。。这两句话这么有点矛盾？

Lov瑜瑜4ever

回复  Lov瑜瑜4ever


    是 ns2np4,写错了！！

不过我已经知道怎样做了。
这样对吗？

The out ...
plouffle0789 发表于 14-9-2011 01:12 AM

没记错是在chemical bonding那课。。
N可以有NCl3
P却可以有PCl3 and PCl5。。。
O和F不可能form OCI and FCI。。。