How do we know whether an element is donating or receiving ions?

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[Christina Ha]

1)How do we know whether an element is donating or receiving ions?
2)If it is donating ions, where were the ions are donated to (or vice versa)?
Please help me

[Ting Tin Chung]

1)How do we know whether an element is donating or receiving ions?
2)If it is donating ions, where were the ions are donated to (or vice versa)?
Please help me

1. Generally, if the elements with 1,2 or 3 valence electrons, the element will donate the valence electron(s)  to achieve the noble gases stability and form a positive ion. If the elements with 5,6, or 7 valence electrons, it will receive electron(s) to achieve the noble gases stability to form a negative ion

2. Of course if a element donate electron, the electron will receive by the element that need electron... did you get what i mean? Please refer chapter 5... chem form 4.....


Am i answering your question ??

[Christina Ha]

i see ....now i understand liao... ...thanks a lot..
Err...another question:
What if the element has 4 valence electrons

[Hon Lian Hung]

.

[Thung Su Ling]

yea...they share the valence electron with other elements to reach the octet electron configuration..

[Tay Guan Piang]

1)How do we know whether an element is donating or receiving ions?
2)If it is donating ions, where were the ions are donated to (or vice versa)?
Please help me

Hi, Christina,
I suppose the question suppose to be sound like this:
1) How do we know whether an element is donating or receiving electron?
2) If it is donating electrons, where were the electrons are donated to (or vice versa)?

Well,
If it is a positive ion (cation), then you know that the element already donated its electron.
If it is a negative ion (anion), then you know that the element already received electrons.

so those elements that has high potential of donating electrons are elements from group 1 till group 13 (this include transition elements).
for group 15, 16 and 17, the elements here are more likely to receive electrons.

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