- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
(a) State Mendeleev’s periodic law.
(b) What chemical properties of elements were used by Mendeleev in creating his periodic table?
(c) State any three limitations of Mendeleev’s classification of elements.
(d) Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in his periodic table ?
(e) Which group of elements was missing from Mendeleev’s original periodic table?
(a) Mendeleev’s periodic law states that the properties of elements are a periodic function of their atomic masses.
(b) The elements having similar chemical properties form oxides and hydrides have similar formulas. Mendeleev used these properties for creating his periodic table.
(c) Limitations of Mendeleev’s classification of elements are given below::
- It failed to explain the position of isotopes.
- The wrong order of atomic masses of some elements could not be explained.
- A position for hydrogen could not be assigned in the periodic table.
(d) Silicon and Germanium two other elements have since been discovered for which Mendeleev had left gaps in his periodic table.
(e) Noble gases were missing from Mendeleev’s original periodic table.
Updated on: 10-Oct-2022
77 Views
Advertisements