Question

write any two characteristics of modern periodic table?
for my heart
to +point​

Answer 1

Answer:

Characteristics of Modern periodic table

The elements are arranged based on their increasing atomic number.

There are 7 periods and 18 groups in the table.

The inert gases i.e. He, Ne, Ar, etc. ...

All the groups are divided into sub groups A and B except 0 and VIII group in the modern periodic table.

Answer 2

Explanation:

1) It is based on atomic number.

2) Here the reasons of misfit pairs have been described and the isotopes have gained specific places.