Question

how many elements should be learnt in periodic table for icse 2020 board exam.​

Answer 1

Answer:

u want to learn the alkali metals,group 1,2,13,14,15,16,17,18

Explanation:

Answer 2

Answer:

The names of at least first 20 elements should be learned by the students of both ICSE and CBSE.

study according to the atomic number.So it will be easy for writing the electronic configuration and valency.

Hope it helps you