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Write the stomic number of the element p...

Write the stomic number of the element placed just below cobalt (Z=27) in the modern periodic table.

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Atomic number of the number is 27+18=45.
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CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION
  1. To whicih groups of the long form of periodic table to the chalcogens ...

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  2. Write the general electronic configuration of innertransition elements...

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  3. Write the stomic number of the element placed just below cobalt (Z=27)...

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  4. Indicate the position of the element having electronic configuration 1...

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  5. What is the total number of elements incorporated till not in the peri...

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  6. Which group of the long form of the periodic table contains solid, liq...

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  7. Which element is the most electronegative?

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  8. Name one property which is not periodic.

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  9. Arrange according to the instructions given the in the bracker: (1) O,...

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  10. Name the elements having highest and lowest ionisation enthalpy.

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  11. What do mean by the statement-covalent radius of H-atom is 0l.37 Å?

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  12. indicate the similarity observed in the electron-gain enthalpy values ...

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  13. Why is the size F^(-) smaller tha that of O^(2-) ion?

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  14. Compare the radii of K^(+) and Cl^(-) ions (each contain the same numb...

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  15. What do you underrstand by negative value of electro-gain enthalpy of ...

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  16. Electronic configuration of the atom of an element is 1s^(2)2s^(2)2p^(...

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  17. Atomic numbers of elements A,B and C are 10,13, & 17 respectively. (1)...

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  18. A, B and C are three elements with atomic numbers 17,18 and 20 respect...

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  19. Outer electronic configuration of 4 elements are as given below follow...

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  20. Write electronic configuration of the element with atomic number 35. w...

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