official.rahulkumaralpha
official.rahulkumaralpha
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24 Aug 2021
Answer: boron has 5 electrons, so it come in 2nd quantom no similarly nitrogen...
24 Aug 2021
Answer: i pick this video because of my brain has interest in that type of pho...
24 Aug 2021
Answer: here all are performing,i.e musician ,orcestra.. here all contributes ...