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Questions and Answers
What was the main criterion used by Mendeleev and Meyer to arrange the elements in their periodic tables?
What was the significance of the vacant sites in Mendeleev's periodic table?
What was the number of elements in Mendeleev's initial periodic table?
What was the arrangement of elements in Mendeleev's periodic table?
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What was the significance of Mendeleev's periodic law?
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What was not included in Mendeleev's initial periodic table?
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Mendeleev's periodic law states that the physical and chemical properties of elements are a function of their atomic numbers.
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Luthar Meyer and Dimitri Mendeleev worked together to develop the periodic table.
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Inert gases were included in Mendeleev's initial periodic table.
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Mendeleev's periodic table consisted of eight horizontal rows and seven vertical columns.
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Mendeleev's periodic table only included elements that were already discovered at that time.
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Mendeleev published his periodic table in 1861.
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Study Notes
Mendeleev's Classification of the Elements
- The earliest version of the current form of the periodic table was presented simultaneously by Dimitri Mendeleev of Russia and Luthar Meyer of Germany.
- Both scientists arranged the elements in order of increasing atomic weights and observed that elements with similar properties (in families) appeared at regular intervals.
Mendeleev's Periodic Law
- Mendeleev's periodic law states that the physical and chemical properties of elements are a periodic function of their atomic weights.
- In 1871, Mendeleev published a short periodic table consisting of only 63 elements.
- Inert gases were not included in the table as they were not discovered at that time.
- The elements were arranged in seven horizontal rows called periods and eight vertical columns called groups.
- Vacant sites were specified for undiscovered elements, and their properties were predicted.
- These predictions were later verified when the elements were discovered.
Mendeleev's Classification of the Elements
- The earliest version of the current form of the periodic table was presented simultaneously by Dimitri Mendeleev of Russia and Luthar Meyer of Germany.
- Both scientists arranged the elements in order of increasing atomic weights and observed that elements with similar properties (in families) appeared at regular intervals.
Mendeleev's Periodic Law
- Mendeleev's periodic law states that the physical and chemical properties of elements are a periodic function of their atomic weights.
- In 1871, Mendeleev published a short periodic table consisting of only 63 elements.
- Inert gases were not included in the table as they were not discovered at that time.
- The elements were arranged in seven horizontal rows called periods and eight vertical columns called groups.
- Vacant sites were specified for undiscovered elements, and their properties were predicted.
- These predictions were later verified when the elements were discovered.
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Description
Learn about Mendeleev's Periodic Law and how it relates to the classification of elements. Understand the arrangement of elements in order of increasing atomic weights and the periodic appearance of elements with similar properties.
