Do we have to learn table of newlands and modern periodic table❓❓�

1.	Do we have to learn table of newlands and modern periodic table❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓
Answer» Only you have to learn modern peroidic table . No need to learn newlands table. Only modern periodic table\'s elements with their valency.

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