To which blocks do the elements with fol...

To which blocks do the elements with following atomic number belong ? 7,13,25,42

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SUBHASH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -TWO marks questions and answers

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Show that Cl, Br, I is a triad or not ?
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To which blocks do the elements with following atomic number belong ? ...
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What are s,p,d and f block elements ?
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Give four characteristics of s-block elements.
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Give four defects of Mendeleev's periodic table.
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On the basis of their electronic configurations, explain why alkali m...
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Give the order in which the melting points of halides of sodium decrea...
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Why are group I elements called alkali metals and group 17 are called ...
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Give four characteristics of d-block elements.
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Give any two features of Mendeleev's periodic table.
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Which alkali metal carbonate is thermally unstable and why ?
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Out of O and S which has higher negative electron gain enthalpy and wh...
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Predict which atom in each of the following Period has the highest fir...
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