Development of the Periodic Table
The development of the periodic table is credited to Mendeleev, a Russian chemist. He is known for creating the first widely recognized periodic table of elements in 1869, which laid the foundation for the modern periodic table we use today.

Mendeleev's Contribution
- Mendeleev arranged the known elements based on their atomic weights and properties, noticing a periodicity in their chemical behavior.
- He left gaps in his table for undiscovered elements, predicting their properties and even their atomic weights accurately.
- Mendeleev's periodic table was groundbreaking as it allowed for the prediction of the properties of unknown elements, leading to the discovery of new elements like gallium and germanium.

Importance of Mendeleev's Periodic Table
- Mendeleev's periodic table provided a systematic way to organize the elements, making it easier to study and understand their properties.
- It helped in identifying patterns and relationships between elements, leading to the development of the periodic law and the modern periodic table we use today.
- The periodic table is now a fundamental tool in chemistry, used to predict the behavior and properties of elements and compounds.
In conclusion, Mendeleev is rightfully credited with the development of the periodic table due to his innovative approach to organizing the elements and his contributions to the field of chemistry.