Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
MediumGive an account of the process adopted by Mendeleev for the classification of elements. How did he arrive at Periodic Law?
(N/A) Mendeleev examined the relationship between the atomic masses of elements and their physical and chemical properties.
Among chemical properties,he concentrated on the compounds formed by elements with oxygen and hydrogen (oxides and hydrides).
He selected these two elements because they are very reactive and formed compounds with most elements.
He wrote down the properties of each element on separate cards and grouped together elements with similar properties.
He observed that most of the elements got arranged in the periodic table in the order of increasing atomic masses.
Based on this,he formulated the Periodic Law,which states that the properties of elements are a periodic function of their atomic masses.
Among chemical properties,he concentrated on the compounds formed by elements with oxygen and hydrogen (oxides and hydrides).
He selected these two elements because they are very reactive and formed compounds with most elements.
He wrote down the properties of each element on separate cards and grouped together elements with similar properties.
He observed that most of the elements got arranged in the periodic table in the order of increasing atomic masses.
Based on this,he formulated the Periodic Law,which states that the properties of elements are a periodic function of their atomic masses.
Explore More
Similar Questions
Write two reasons responsible for the late discovery of noble gases.
Easy
View SolutionWhich of the given elements $A, B, C, D$ and $E$ with atomic numbers $2, 3, 7, 10$ and $30$ respectively belong to the same period?
Medium
View SolutionThree elements $X$,$Y$,and $Z$ having atomic numbers $11$,$7$,and $6$ respectively react with oxygen to form their oxides.
$(a)$ Arrange these oxides in increasing order of their basic nature.
$(b)$ Give reason for your answer.
$(a)$ Arrange these oxides in increasing order of their basic nature.
$(b)$ Give reason for your answer.
Medium
View SolutionThe electrons in the atoms of four elements $A, B, C$ and $D$ are distributed in three shells having $1, 3, 5$ and $7$ electrons in the outermost shell respectively. State the period in which these elements can be placed in the modern periodic table. Write the electronic configuration of the atoms of $A$ and $D$ and the molecular formula of the compound formed when $A$ and $D$ combine.
Medium
View SolutionPredict the maximum number of valence electrons possible for atoms in the first period of the periodic table.
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo