Question

No mam hydrogen helium lithium like this serially how can i remeber it quickly as i have seen in the reactivity series

Answer 1

The elements in a periodic table can be memorised easily with a method called as mnemonics. This a way of associating the letters indicating their formula into words of a meaningful sentence. I am giving you an example of a mnemonic device used to memorise Neon to Argon (Ne, Na, Mg, Al, Si, P,S, Cl, Ar)
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There are much of such mnemonic devices and songs are available to memorise any number of elements. But it will be better to create a unique own mnemonics device with the familar words and preferably without any restriction.