1. Of which of thefollowing sub-atomic particle(s) the nuclei of atoms must consist? (1) protons (2) neutrons (3) electrons A. (1) only B. (2) only C. (1) and (2)only D. (1), (2) and (3)點解答案係A?
f.3 chem atomic structures
2012-04-03 7:27 pm
回答 (3)
2012-04-03 11:15 pm
A
Hint:(properties of hydrogen)
Hint:(properties of hydrogen)
2012-04-03 8:54 pm
其實唔關ion事
因為題目係問nuclei of atoms
係atom既nuclei 淨係得proton/neutrons 而無electron (3)錯
(electron淨係會係nucleus 既周圍轉)
因為hydrogen atom 係冇neutron 所以(2)錯
因為題目係問nuclei of atoms
係atom既nuclei 淨係得proton/neutrons 而無electron (3)錯
(electron淨係會係nucleus 既周圍轉)
因為hydrogen atom 係冇neutron 所以(2)錯
2012-04-03 8:21 pm
Using hydrogen atoms as an example.
Normal hydrogen atoms have no neutrons and only one proton and electron.
But a few of them have.
So (2) is wrong.(notice the statement)
When a hydrogen atom lose the electron, it become ion H+
Just like HCl=H+ and Cl-
So (3) is wrong.
So the answer is A.
2012-04-03 21:08:35 補充：
To:智遠
thx
Normal hydrogen atoms have no neutrons and only one proton and electron.
But a few of them have.
So (2) is wrong.(notice the statement)
When a hydrogen atom lose the electron, it become ion H+
Just like HCl=H+ and Cl-
So (3) is wrong.
So the answer is A.
2012-04-03 21:08:35 補充：
To:智遠
thx
參考: me, me
收錄日期: 2021-04-13 18:36:05
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