10-Classi. of elements & periodicity in props.

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Remembering the properties of the s-block elements
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Biragam Singh
Augbau principle
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In any period atomic radius of _______ is highest
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Actinoids (f-block)
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Four successive members of the first-row transition elements are listed below with their atomic numbers. Which one of them is......?
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The outer electronic configuration of Gd (Atomic no. 64) is:
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The radius of La³+ (at. no. 57) is 1.06 A The radius of Lu³+ (at.no. 71) might be:
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Which of the following bicarbonates is the least thermally stable ?
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Ionic radii are :
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Elements of group I B is called as:
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The most common oxidation state of cerium (Ce) is:
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General electronic configuration of outermost and penultimate shell of an atom is
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How to learn periodic table ?
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According to Moseley, a straight-line graph is obtained on plotting:
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Which property of lithium is most similar to that of magnesium due to diagonal relationship ?
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Which of the following alkaline earth metal sulfates shows maximum solubility in water ?
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An unknown metal gives a crimson red color in a flame test. It is likely to be:
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An element X occurs in short period having configuration ns2np¹. The formula and nature of its oxide are:
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Which of the following oxides is amphoteric in nature ?
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Because of lanthanoid contraction , which of the following pairs of elements have nearly same atomic radii ? (Numbers in the brackets are atomic numbe
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Does electronic configuration of elements change in periodic table or not ?
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