which among the following elements whose atomic number are given below belong to the (1)same period ?give the reason (17,10,20,12,19,15)
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elements with atomic number 17,12,15 belong to period 3 and elements with atomic number 19,20 belong to period 4 because their valence electron lie in the same shell.
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Answer:
elements with atomic number 17,12,15 belong to period 3 and elements with atomic number 19,20 belong to period 4 because their valence electron lie in the same shell.
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