Name one metal.
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Is there any trick to learn all the elements with their valences.
Please help using the method which is applicable for 11th standard CBSE.
What will be the pattern for CBSE 2019-20 Examinations.
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Is there any trick to learn all the elements with their valences.
Please help using the method which is applicable for 11th standard CBSE.
What will be the pattern for CBSE 2019-20 Examinations.
