Question

Write a note of MODERN PERIODIC TABLE .​

Answer 1

Modern periodic table

The modern periodic table was prepared by Neils bhor . It is also known as long form of periodic table. In the modern periodic table the elements are arranged in the order of increasing atomic numbers in horizontal rows called periods.

the arrangement of elements in the modern periodic table is based on the electronic configuration.

Answer 2

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The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties.

The structure of the table shows periodic trends.

The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right.

The columns, called groups, contain elements with similar chemical behaviours.

Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases.

Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals.