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Mendeleev’s Periodic Table Video Lecture - Class 10

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FAQs on Mendeleev’s Periodic Table Video Lecture - Class 10

1. Who is Mendeleev and what is his contribution to the periodic table?
Ans. Dmitri Mendeleev was a Russian chemist who is credited with creating the periodic table. His contribution was the arrangement of elements in increasing atomic mass and grouping them based on their similar properties. He also left gaps in the periodic table for undiscovered elements which helped predict the properties of these elements.
2. How did Mendeleev organize the elements in his periodic table?
Ans. Mendeleev organized the elements in his periodic table in increasing order of atomic mass. He also grouped elements with similar properties together in vertical columns known as groups. This arrangement allowed for the identification of trends and patterns in the properties of elements.
3. What are the advantages of using Mendeleev's periodic table?
Ans. Mendeleev's periodic table provides a systematic and organized way to study and understand the properties of elements. It allows for the prediction of the properties of undiscovered elements based on their position in the table. It also helps in identifying similarities and trends in the behavior of elements within the same group or period.
4. How does the periodic table help in understanding chemical reactions?
Ans. The periodic table helps in understanding chemical reactions by providing information about the valence electrons and properties of elements. Elements in the same group have similar valence electron configurations, which influences their reactivity and the types of compounds they form. The periodic table also shows the electronegativity and ionization energy trends, which are important factors in chemical reactions.
5. How has Mendeleev's periodic table evolved over time?
Ans. Mendeleev's periodic table has evolved over time with the discovery of new elements and advancements in atomic theory. Initially, elements were arranged based on their atomic mass, but later it was revised to arrange them based on atomic number. New elements have been added to the table, and the positions and properties of existing elements have been refined based on experimental data and theoretical models.
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