Question

Write about:-

=> Modern periodic law

=> Modern periodic table

Answer 1

${\boxed {\boxed { \sf { \underline { Here's \: the \: answer}}}}}$

${\underline { \sf {Modern \: Periodic \: Law }}}$

✌️✔️In the year 1913 A.D, An English scientist Henry Moseley demonstrated, with the help of experiments done using X-ray tube , that the atomic number ( Z ) of an element corresponds to the positive charge on the nucleus or the number of the protons in the nucleus of an atom.

✌️✔️This revealed that "Atomic number" is a more fundamental property of an element than it's atomic mass.

✌️✔️Thus, Accordingly, the statement of the modern periodic law was stated as follows :-

✌️✔️" Properties of elements are a periodic function of the atomic numbers. "

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${\underline { \sf {Modern \:Periodic \: Table}}}$

✌️✔️Classification of elements resulting from an arrangement of the elements in an increasing order of their atomic numbers is the Modern Periodic Table.

✌️✔️Properties of the elements can be predicted more accurately with the help of the modern periodic table formed on the basis of atomic numbers. The modern Periodic Table is also called the long form of the periodic table.

✌️✔️Modern Periodic Table contains Seven horizontal rows called the periods 1 to 7.
Similarly, the eighteen vertical colomns in this table are the groups 1 to 18.

✌️✔️Apart from these seven rows , two rows are shown separately at the bottom of periodic table. These are called Lanthanides series and actinide series respectively.

✌️✔️There are 118 boxes in the periodic table which means there are 118 places for elements in the modern periodic table.

This is what the modern periodic table is.

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Answer 2

$\huge \bf{ \red{hey}}$

$\huge{ \mathfrak{ \blue{here \: is \: answer}}}$

$\bf{ \green{modern \: periodic \:law}}$
in the year 1913, a scientist named H.G.J. Moseley who lived in England proved that the more fundamental property of an element is its atomic number. therefore, he suggested that the basis of classification of elements should be atomic number. This led to the formation of modern periodic law, Which states that

$\sf{the \: properties \: of \: elements \: are}$
$\sf{periodic \: function \: of \: their \: atomic \: number}$
now

$\bf{ \green{modern \: long \: form \: periodic \: table}}$
a scientist named Bhor had taken atomic number as the basis of classification of elements and constructed a Periodic Table known as the long form periodic table in 1920 . In 1984 IUPAC ( International union of pure and applied chemistry) recommended that the groups in the long form periodic table be numbered from the left, as 1 to 18.

the long form form periodic table relates the position of the element to its electronic configuration.

the modern periodic table is classified on the basis of their atomic masses so it is easy to point the position of isotopes in it.
and

in modern periodic table there are 7 periods
similar to mandeleve's periodic table but more that rows than his table.

there are 118 elements present in it

the most reactive element is lithium

and most reactive metal is potassium

$\huge \boxed{ \boxed{ \pink{hope \: it \: helps}}}$
$\huge{ \mathfrak{thanks}}$