State modern periodic table law?

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Answer

¶¶ Modern periodic law: Physical and chemical properties of the elements are the periodic functions of their atomic numbers.

1)No of periods: 07

2)No of groups: 18.

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Modern periodic table law state that the physical and chemical properties of elements are periodic function of their atomic number

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According to the modern periodic law,  when elements are arranged according to increasing atomic numbers,  there is a periodicity in the electronic configuration of elements. The periodicity  in electronic configuration of elements leads to the periodicity in their chemical properties

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State modern periodic table law.?

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Answer

Modern Periodic Table Law
The modern periodic table law states that the physical and chemical properties of elements are periodic functions of their atomic numbers. This law was formulated by the Russian chemist Dmitri Mendeleev in 1869. Mendeleev arranged the elements in order of increasing atomic number and noticed that elements with similar properties occurred at regular intervals.

Explanation

Periodic Function: The periodic table is arranged in periods (rows) and groups (columns). Elements in the same group have similar chemical properties due to their similar electronic configurations. As we move across a period from left to right, the number of protons and electrons increases, resulting in a gradual change in properties. When we move down a group, new energy levels are added, causing a similar pattern of properties within the group.

Atomic Number: The atomic number of an element is the number of protons in its nucleus. It determines the element's identity and position in the periodic table. Elements are arranged in order of increasing atomic number, which leads to a periodic repetition of properties.

Properties: The physical and chemical properties of elements, such as atomic radius, electronegativity, ionization energy, and reactivity, exhibit periodic trends across the periodic table. These trends help predict how elements will behave in chemical reactions and how they will interact with other elements.

Conclusion
The modern periodic table law is a fundamental principle in chemistry that organizes the elements based on their atomic numbers and reveals the periodic trends in their properties. This organization allows scientists to predict the behavior of elements and develop relationships between different elements, leading to a better understanding of the elements and their interactions.

Similar Class 10 Doubts

State modern periodic table law.?

State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non metals and metalloids

The Electronic Configuration of an Element 'X' is 2,8,2. To which group and period of the modern periodic table does 'X' belong. State it's valency and justify your answer in each case?

Q1. Why was it necessary to change the basis of classification from atomic mass to atomic number? Q2. (

Write the number of periods and groups present in the modern periodic table. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we go down a group ?

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