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Mendeleev's Periodic Table and its Achievements (Easy Explanation) Video Lecture - Class 10

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1. What is Mendeleev's Periodic Table and its significance?

Ans. Mendeleev's Periodic Table is a tabular arrangement of chemical elements based on their atomic number, electron configuration, and recurring chemical properties. It was devised by Russian chemist Dmitri Mendeleev in 1869. This periodic table is significant because it organized the elements in a systematic manner, allowing scientists to predict the properties of undiscovered elements and understand the relationship between different elements.

2. How did Mendeleev organize the elements in his periodic table?

Ans. Mendeleev organized the elements in his periodic table by arranging them in order of increasing atomic mass. He created rows called periods and columns called groups. Elements with similar properties were placed in the same group. Mendeleev left gaps in his table for elements that were yet to be discovered, and he also predicted their properties based on the patterns observed in the table.

3. What are some achievements of Mendeleev's Periodic Table?

Ans. Mendeleev's Periodic Table achieved several significant milestones. Firstly, it provided a systematic arrangement of elements, allowing scientists to study and understand the properties of various elements more effectively. Secondly, it predicted the existence and properties of elements that were later discovered, such as gallium, germanium, and scandium. Thirdly, the periodic table helped in identifying and filling gaps in knowledge about elements and their properties. Lastly, it facilitated the development of the modern periodic table, which is now used worldwide.

4. How does Mendeleev's Periodic Table help in predicting the properties of elements?

Ans. Mendeleev's Periodic Table helps in predicting the properties of elements by organizing them based on their atomic number and electron configuration. Elements with similar properties are grouped together, allowing scientists to make generalizations and predictions. For example, if an element is placed in the same group as elements known to be highly reactive, it can be predicted that the new element will also exhibit similar reactivity. Additionally, the periodic table provides a framework for understanding trends in properties such as atomic radius, ionization energy, and electronegativity as one moves across a period or down a group.

5. How did Mendeleev's Periodic Table contribute to the development of modern periodic tables?

Ans. Mendeleev's Periodic Table laid the foundation for the development of modern periodic tables. It demonstrated the significance of organizing elements based on atomic number rather than atomic mass. Subsequent modifications and advancements in the understanding of atomic structure and quantum mechanics led to the development of the modern periodic table, which is based on the arrangement of elements according to their atomic number and electron configuration. The modern periodic table retains the basic structure and principles outlined by Mendeleev but incorporates more accurate and detailed information about the elements.

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	Dec 23, 2024 Last updated

Mendeleev's Periodic Table and its Achievements (Easy Explanation) for Class 102024 is part of Class 10 preparation. The notes and questions for Mendeleev's Periodic Table and its Achievements (Easy Explanation) have been prepared according to the Class 10 exam syllabus. Information about Mendeleev's Periodic Table and its Achievements (Easy Explanation) covers all important topics for Class 102024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Mendeleev's Periodic Table and its Achievements (Easy Explanation).

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