I am glad that I am a subscriber of tooperlearning but I am facing a problem in learning the valancies or symbols of the elements.
I would be highly obliged if you can help me out of this by giving me a suggestion as to how can I learn it.
Asked by deeksha_pareek | 6th Nov, 2014, 11:28: PM
Please write and memorise the chart:
Answered by Prachi Sawant | 10th Nov, 2014, 10:49: AM
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