Question

define medeleev's periodic table? what are the achievement of Mendeleev? write it's demerits​

Answer 1

$defination$

Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He is best remembered for formulating the Periodic Law and creating a farsighted version of the periodic table of elements.

Born: 8 February 1834, Tobolsk, Russia

Died: 2 February 1907, Saint Petersburg, Russia

Full name: Dmitri Ivanovich Mendeleev

Nationality: Russian

Awards: Demidov Prize, Davy Medal, Copley Medal

Education: Saint Petersburg State University (1855–1856).

$achiviments$

Achievements of Mendeleev's Periodic Table

Systematic study of the elements. ...

Prediction of new elements and their properties. ...

Correction of doubtful atomic masses. ...

Position of hydrogen. ...

Anomalous positions of some elements. ...

Position of isotopes. ...

No co-relation of elements in sub-groups. ...

Different groups for similar elements.

$demerits$

Demerits of Mendeleev Periodic Table

He was unable to locate hydrogen in the periodic table.

Increase in atomic mass was not regular while moving from one element to another. ...

Later on, isotopes of elements were found which violated Mendeleev's periodic law.