Question

Write modern periodic law? Write three characteristics of modern periodic
table.

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Answer 1

1)The elements in the periodic table are arranged in the increasing order of their atomic number or electronic configurations . 2) The horizontal rows are called as "periods". 3) The vertical columns are called as " groups" . 4)The Modern periodic table consists of 7 periods and 18 groups.

Answer 2

Answer:

the law that the properties of the elements are periodic functions of their atomic numbers. Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.

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.

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