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Name unknown elements at the time of Men...

Name unknown elements at the time of Mendeleef.

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Name unknown group of elements at the time of Mendeleef

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From a study of the properties of the neighbouring elements, the properties of an unknown element can be predicted. Justify with an example.

From a study of properties of neighbouring elements, the properties of an unknown element can be predicted - justify with an example.

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Important Questions
  1. Name the family with highest value of ionization enthalpy.

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  2. Which element possesses highest electron affinity?

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  3. Name unknown elements at the time of Mendeleef.

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  4. Name any two typical elements.

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  5. On the basis of quantum numbers, justify that the 6^(th) period of the...

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  6. Why f-block elements are placed below the main table.

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  7. Give any five of the characteristic properties of transition elements.

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  8. What are rare earths and transuranic elements?

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  9. What is isoelectronic series? Name a series that will be isoelectronic...

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  10. IE(1) of Na is less than that of Mg but IE(2) of Na is higher than tha...

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  11. Increasing order of reactivity among group - 1 elements is Li < Na < K...

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  12. Predict the formulae of the stable binary compounds that would be form...

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  13. Which element of 3^(rd) period has the highest I.E(1) ? Explain the va...

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  14. What is valency of an element? How does it vary with respect to hydrog...

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  15. What is diagonal relationship? Give a pair of elements having diagonal...

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  16. What is lanthanoid contraction ? What are the consequences of lanthano...

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  17. Define the mordern periodic law . Discuss the construction of t...

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  18. Write an essay on s, p, d and f-block elements.

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  19. What is a periodic property? How the following properties vary in a gr...

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  20. What is a periodic property? How the following properties vary in a gr...

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