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Why is hydrogen placed separately on the...

Why is hydrogen placed separately on the top left corner of the Modern Periodic Table?

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Hydrogen possesses unique properties which make it stand apart from other elements. Its properties resemble those of alkali metals as well as halogens - it can lose one electron like alkali metals and gain one electron like halogens. Hence, it is placed separately on the top left corner of the Modern Periodic Table.
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)
  1. Identify and name the metals out of the following elements whose elect...

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  2. Mention any two demerits of the long form of the periodic table.

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  3. Why is hydrogen placed separately on the top left corner of the Modern...

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  4. Why did the law of triads fail?

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  5. Mention the merits of Newlands' law of octaves.

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  6. What were the limitations of Newlands' law of Octaves ?

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  7. Why do all elements of the same group have similar properties?

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  8. The atomic numbers of three elements A, B, and Care 12, 18, and 20 res...

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  9. Taking the example of an element of atomic number 16, explain how the ...

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  10. The electronic configuration of an element 'X' is 2, 8, 8, 2. To which...

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  11. All the members of group I are metals. Li and Na react with water rapi...

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  12. Atomic number is considered to be a more appropriate parameter than at...

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  13. How does the electronegativity changes as we move from left to right a...

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  14. How would the tendency to gain electrons change as you go from left to...

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  15. a) How does electropositivity of elements get affected as we move: (i)...

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  16. Why are metals electropositive and non-metals electronegative in natur...

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  17. Name three elements with seven valence electrons in their outermost sh...

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  18. Inert gases are placed in a separate group in the Modern Periodic Tabl...

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  19. a] What are metalloids? Write any two examples. b] Given below are s...

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  20. a] Write the trend of atomic size and metallic character along a group...

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