<span>The periodic law states that the physical and chemical properties of elements are periodic functions of their "Atomic Numbers"
So, option B is your answer.
Hope this helps!
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Answer:
it is positive and it reacts
1 mole ----------- 22.4 L ( at STP )
3.5 mols --------- ?
V = 3.5 x 22.4 / 1
V = 78.4 L
hope this helps!