Chemistry
How were elements arranged in the long form of the periodic table or the Modern Periodic Table. State the Modern Periodic Law and compare it with Mendeleeff's Periodic Law.
Periodic Table
84 Likes
Answer
In the Modern Periodic Table elements are arranged in increasing order of atomic number.
Modern Periodic Law states that the physical and chemical properties of elements are periodic function of their 'atomic numbers'.
Mendeleeff's Periodic Law states that the physical and chemical properties of elements are periodic function of their 'atomic weights'.
The basis of classification in Mendeleeff's Periodic Law was atomic weight of the element whereas in the Modern Periodic Law it is the atomic number of elements. This change in the Modern Periodic Law solves most of the defects in Mendeleeff's Periodic table.
Answered By
50 Likes
Related Questions
State the contributions made by Mendeleeff towards the periodic table.
What were the defects and anomalies in Mendeleeff's Periodic Table and how are they resolved by Moseley.
What are periods in a periodic table. What is meant by 'period number'. What does it signify.
Name the period which is the shortest period and state the number of elements present in it. State the number of elements in the second and the third periods of the periodic table.