Question

Class 10.................
Pls answer fast................
5merits of Mendeleev periodic table.

Answer 1

h!!! friend

◆ merit of Mandleleeve periodic table

●mendeleeve periodic law predicted the existence of some element that had not been discovered at that time.

●mendeleevs periodic table could predict the properties of several.

●mendeleeves periodic table could accommodate noble gases when they were discovered ...


hope it help you


?@,rajukumar ☺☺

Answer 2

$\underline \mathbb{MERITS}$

》POSITION OF HYDROGEN

• The electronic configuration of hydrogen resembles with alkali metals.Moreover,it combines with halogen,oxygen and sulphur to give similar type of compounds as given by alkali metals,

Example HCL,NaCL

》POSITION OF ISOTOPES

•Isotopes of an elements have similar chemical properties but different atomic masses.In mendeleev's periodic table,no place was given to these elements,

Example The element chlorine has two isotopes CL-35 and CL-37,

》UNCERTAINITY IN ATOMIC MASSES

•Another problem was that the atomic masses do not increase in a regular manner in going from one element to the next.So,it was not possible to predict how many elements could be discovered between two elements specially when we consider the heavier elements.

》PLACING OF HEAVIER ELEMENT BEFORE THE LIGHTER ONE

•Few elements, those process higher atomic mass where placed before elements having a lower atomic mass.

Example- Argon (39.9)

Nickel(58.7)

_____________________________________

#BAL

#Answerwithquality