Question

How to learn a periodic table? And what I should learn in periodic table?

Answer 1

Make up acronyms or acrostics to remember chunks of the periodic table. This is less effective than visual imagery, but can work better than brute force repetition. While acrostics are much easier to create for the elements, acronyms can be done, too. This will provide a que for several elements in one word or phrase.

• An acrostic for nitrogen, oxygen, fluorine and neon might be something like No Openings For Ned. The first one or two letters of each word represent an element (N, O, F, Ne).
• An acronym for the same four elements would be No fee (pronounced noff-nee).
• A similar approach to acronyms and acrostics is to make a song that includes the names of the elements. This can be a little more effective, but is also more time consuming.

What you should learn in periodic table are,
Atomic number of each element only.
You will get all other required things from atomic number.
Like the mass number, periodic trends of elements, electronic configuration...
So just study the atomic number.