Which oneof the followingelementsposeda challenge to Newlands 'slaw of

1.	Which oneof the followingelementsposeda challenge to Newlands 'slaw of octaves ? Li, Be , B , C , N , O ,F , Ne , Na
Answer» SOLUTION :Newland'slaw ofoctavesstates thatwhen ELEMENTSARE arranged order of increasingatomicweights then theeveryeighth elementresemblesthe firstone . Butwhen innergas (NE wasdiscovered. Then it WASTHE ninthwhichresembles the firstone . Thereforethe elementinert gas Ne POSED a challange to Newlands's law ofoctaves.

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