Question

write a note on modern periodic table​

Answer 1

Answer:

The periodic table is based on atomic masses and similar properties. In each row, the atomic masses increase toward the right. Each column contains a group of elements with similar chemical behavior. ... The elements are arranged in order of increasing atomic number in horizontal rows called periods.

Explanation:

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Answer 2

Answer:

The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. The number above each symbol is its atomic numbᴇʀ.