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Classification of Elements and Periodicity in Properties

Madhya Pradesh Board · Class 11 · Chemistry

Flashcards for Classification of Elements and Periodicity in Properties — Madhya Pradesh Board Class 11 Chemistry. Quick Q&A cards covering key concepts, definitions, and formulas.

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Card 1Genesis of periodic classification

What did Dobereiner observe in the Law of Triads?

Answer

Elements could be arranged in groups of three with similar properties. The atomic weight of the middle element was about halfway between the other two, and its properties were intermediate. Example tr

Card 2आवर्त वर्गीकरण की उत्पत्ति

डोबेराइनर ने ट्रायडों के नियम में क्या देखा?

Answer

तत्वों को समान गुणों वाले तीन-तीन के समूहों में रखा जा सकता था। मध्य तत्व का परमाणु भार लगभग अन्य दो के बीच का आधा था, और उसके गुण मध्यवर्ती थे। उदाहरण ट्रायडों में Li-Na-K, Ca-Sr-Ba, और Cl-Br-I शामिल

Card 3आवर्त वर्गीकरण की उत्पत्ति

न्यूलैंड्स का ऑक्टेवों का नियम क्या है?

Answer

परमाणु भारों के बढ़ते क्रम में व्यवस्थित तत्वों से पता चला कि हर आठवाँ तत्व पहले तत्व के समान गुण रखता था। यह नियम केवल कैल्शियम तक ही काम करता था।

Card 4Genesis of periodic classification

What is Newlands' Law of Octaves?

Answer

Elements arranged in increasing order of atomic weights showed that every eighth element had properties similar to the first. The law worked only up to calcium.

Card 5Genesis of periodic classification

Why was de Chancourtois important in periodic classification?

Answer

In 1862, he arranged known elements by increasing atomic weight in a cylindrical table to show periodic recurrence of properties.

Card 6आवर्त वर्गीकरण की उत्पत्ति

आवर्त वर्गीकरण में दे शांकोर्तुआ क्यों महत्वपूर्ण थे?

Answer

1862 में, उन्होंने ज्ञात तत्वों को परमाणु भार बढ़ते क्रम में एक बेलनाकार सारणी में व्यवस्थित किया ताकि गुणों की आवर्ती पुनरावृत्ति दिखाई जा सके।

Card 7आवर्त नियम

मेंडेलीव का आवर्त नियम क्या है?

Answer

तत्वों के गुण उनके परमाणु भारों के आवर्ती फलन होते हैं।

Card 8Periodic law

What is Mendeleev's Periodic Law?

Answer

The properties of the elements are a periodic function of their atomic weights.

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