NCERT Solutions Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties

Class 11 Chemistry NCERT Solutions Chapter 3 Elements Classification and Periodicity in Properties - To fully comprehend each concept, please consult our NCERT Solution. Our solutions offer a comprehensive package for preparing for board exams and passing competitive exams such as JEE Mains, JEE Advance, NTSE, and others. The following are important topics covered in NCERT Solutions Class 11:

Classification of Elements and Periodicity in Properties - Elements are classified into various categories to facilitate element study. Many attempts were made to classify elements, such as Dobereiner's Triads and Newland's Octave. 

o   Dobereiner's Triads - Johann Wolfgang Dobereiner, a German chemist, was the first to attempt to group elements with similar properties into groups of three elements. Dobereiner's triad was the name he gave to these groups. In his triads, Dobereiner explained that the atomic mass of the middle element would be roughly equal to the average of the atomic masses of the other two elements in the triad.

o   Newland's Octave - John Newlands, an English scientist, attempted to arrange 56 known elements in increasing order of atomic mass. Every eighth element, according to Newland, exhibited properties similar to the first.

o   Mendeleev's periodic table - In 1869, Dmitri Ivanovich Mendeleev presented his periodic table. He discovered that the physical and chemical properties of elements were related to their atomic mass on a regular basis. Need to Classify Elements - During the nineteenth century, many new elements were discovered, making it difficult to study each one individually. To address this issue, intellectuals proposed organizing the elements.

·        Need to Classify Elements - During the nineteenth century, many new elements were discovered, making it difficult to study each one individually. To address this issue, intellectuals proposed organizing the elements.

·        Modern Periodic Law and the Current Form of the Periodic Table - The elements in the modern periodic table are arranged in a periodic function of their atomic number based on their physical and chemical properties.

·        Elements with Atomic Numbers Greater Than 100 - The periodic table contains approximately 118 elements. In most cases, the person who discovered the element is given the honor of naming it. The name of an element is derived from its physical or chemical properties as well as its origin.

·        Elements' electronic configuration - An element's electron configuration describes how electrons are distributed in its atomic orbitals and their energy levels.

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