Question

what is most important thing to learn in periodic table ​

Answer 1

hola mate....

FIRST LEARN ALL THE ELEMENTS

THEN U HAVE TO LEARN INCREASING OR DECREASING PROPERTIES LIKE ATOMIC RADIUS, IONISATION ENTHALPY ETC

Answer 2

Starting 20 elements (upto class 10)

Group 13 to group 18 .(in class 11)