Question

Give a brief description of groups and periods in the Bohr's long form of periodic table. ​

Answer 1

Explanation:

vertical coloumns in periodic table is called groups and horizontal rows are called periods.

bhors in 1920 modified the modern periodic table which is name as long form of modern periodic table.hence it is improved and extended to form of mendeleevs periodic table and is based on the modern periodic law.

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