relative atomic mass同relative isotopic mass有咩唔同,兩者係唔係一樣??
點解isotopes of the same element會有同樣的chemical properties,但唔係一樣既phyical properties?
Why scientists choose carbon-12 isotope to be the standard, 其他元素唔得嗎?
中四化學問題
2007-09-08 3:54 pm
回答 (3)
2007-09-08 5:19 pm
✔ 最佳答案
1.原子群眾和同位素不同的是.有很大分析原子群眾所指是原子結構排例不同.可以有碳和鑽石看出原子群眾排列不同,性質不同.同素異形體.
2.同位素是指同一個元素中子數不相同.雖然他們的中子數不相同,但他們的化學基礎相同.
2.因為他們的原子結構排列沒有太大的改變.所以化學性質改變比較小.
3.因為碳-12比較穩定.相對於其他元素比較好.
ps:我是中數......
2007-09-08 5:09 pm
relative isotopic mass 係某一個isotopic 的mass, relative atomic mass 就係某一種element 的平均的mass(因為一隻element都可以有幾種唔同ge isotopic,所以同相對豐度(relative abundance)有關係)
isotopes 有一樣ge chemical properties because chemical properties係與number of protons 有關, 與number of neutrons則無關.因為多左or少左neutrons, 所以phyical properties 有唔同.
至於點解用carbon-12我就唔知喇
isotopes 有一樣ge chemical properties because chemical properties係與number of protons 有關, 與number of neutrons則無關.因為多左or少左neutrons, 所以phyical properties 有唔同.
至於點解用carbon-12我就唔知喇
參考: me
2007-09-08 4:55 pm
relative atomic mass同relative isotopic mass有咩唔同我就唔記得啦= ="岩岩放完假.乜都唔記得哂.
As chemical properties is affect by the electron inside the element.Isotopes has same number of electron,but different number of 中子.so the phyical properties will have different.
Since carbon is a 惰性element.佢唔會亂咁同other element under go 化學反應.所以佢係會比較穩定.我諗另外同佢個質量有關. 大概係咁啦@@"
As chemical properties is affect by the electron inside the element.Isotopes has same number of electron,but different number of 中子.so the phyical properties will have different.
Since carbon is a 惰性element.佢唔會亂咁同other element under go 化學反應.所以佢係會比較穩定.我諗另外同佢個質量有關. 大概係咁啦@@"
參考: me
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