What is the number of elements in the th...

What is the number of elements in the third period?

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MODERN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-EXAMPLE

What is the number of elements in the third period?
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A part of the periodic table is show below: Which of these is/are nob...
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A part of the periodic table is show below: Which of these is/are hav...
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A part of the periodic table is show below: Which of these is/are hav...
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A part of the periodic table is show below: Which of these is/are alk...
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Consider the group 1 of the periodic table and answer the following qu...
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Consider the group 1 of the periodic table and answer the following qu...
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Consider the group 1 of the periodic table and answer the following qu...
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Consider the group 1 of the periodic table and answer the following qu...
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Two elements X and Y have atomic number 6 and 17 respectively. To whic...
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The second period of the long time of periodic table contains the foll...
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The second period of the long time of periodic table contains the foll...
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How were the positions of isotopes of varoius elements decided in the ...
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Is it possible to have an element with atomic number 1.5 placed betwee...
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Where do you think should hydrogen be placed in the Modern Peridic tab...
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How do you calculate the valency of an element from its electronic con...
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What is the valency of magnesium with atomic number 12 and sulphur wit...
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Find out the valencies of the first two elements.
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How does the valency vary in the period on going from left to right?
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How does the valency vary on going down a group?
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In a periodic table How do you think the tendency to lose electrons wi...
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