Question

main points about modern periodic table​

Answer 1

✨Modern periodic table is based on increasing atom number.

✨It was found by Henry Moseley.

✨No fixed position of hydrogen.

✨Electronic configuration of elements can be found.

✨No special place for isotopes.

✨Vertical columns are groups(18).

✨horizontal columns are periods (7).

✒✒✒✒✒✒✒✒✒✒✒✒✒✒

HOPE IT HELPS YOU ✨❤

Answer 2

Mostly modified Mendeleev’s periodic law. He stated “Physical and chemical properties of elements are the periodic function of their atomic numbers.”

It is known as modern periodic law and considered as the basis of Modern Periodic Table.

In this table, the elements have been arranged in increasing atomic number

The long form of periodic table also consists of the vertical rows called groups. There are in all 18 groups in the periodic table

Horizontal rows in a periodic table are known as periods. There are in all seven periods in the long form of periodic table.