How many elements are there in first ...

How many elements are there in first period in the periodic table ?

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What is a period in modern periodic table ?

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The first element in the periodic table is_____.

What are the valencies of 1^(st) and least elements of every period in the periodic table ?

Which period starts with M main shell? Name the sub-shells in it? How many elements are there in this period ? Name any two elements in it ?

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How many elements are present in the 5 ^(th) period of the long form peripodic table ? Give a possible reason .

VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS -THE PERIODIC TABLE -CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION -I)

match the above
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Which statement is wrong ?
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How many elements are there in first period in the periodic tab...
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which block elements are called Lanthanoids / actinoids ?
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match it {:("a)",""(58)Ce-""(71)Lu,"i) Actinoids "),("b)",""(90) ...
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Which block elements are called as transition metals ?
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Which block elements are called the inner transition elements ?
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Give two example to semi conductors?
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Which block contains metals only ?
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TO which group Lanthanoids and actinides belongs ?
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Who did experiments to calculate the number of positive charges ...
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A: Elements along a period possess different chemical properties...
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Which property of an element is called as combining power of it...
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In NaH , what is the valency of 'Na' ?
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In CaO, what is the valency of 'Ca' ?
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What is the valency of an element if that element is in the g...
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What are the valencies of 1^(st) and least elements of every pe...
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How does the valency vary on going down a group ?
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Which property of an element is defined as the distance from t...
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By which units atomic radius is measured ?
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