Mendeleev's Pertodic Law was modified, and ___________ was adopted as the bons of the Modern Penocie Table.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Atomic number.
- When scientists found that the properties of elements are more accurately related to their atomic numbers than to their atomic masses, they changed Mendeleev's Periodic Law, which was based on the atomic masses of elements.
- As a result of this change, the Modern Periodic Table's primary organizing principle is now atomic number.
- Inconsistencies in Mendeleev's table were fixed by Moseley's proposal to arrange the elements by atomic number, which also made it possible to comprehend element properties and periodic trends more precisely.