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Write the formulae of chlorides of Eka-s...

Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the elements predicted by Mendeleev.

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Eka-silicon is identified as germanium (Ge) which is placed in group 4 of Mendeléer.s periodic table. The valency of germanium is 4: so the chemical formula for its chloride must be `GeCI_4`.
  Eka-aluminium was later identified as gallium (Ga). It is placed in group 3 of the Mendeléev.s periodic table. Hence the valency of gallium is 3 and the formula of chloride would be `GaCl_3`.
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)
  1. Elements have been arranged in the following sequence on the basis of ...

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  2. Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the ...

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  3. Arrange the following elements in increasing order of their atomic rad...

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  4. Identify and name the metals out of the following elements whose elect...

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

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

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  7. Why did the law of triads fail?

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

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

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

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

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

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

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

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

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

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

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

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

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

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