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Define (a) ionic radii and (b) covalent ...

Define (a) ionic radii and (b) covalent radii.

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Ionic radii is defined as distance from the centre of nuclei up to which influence of nucleon can be felt.
Covalent radii is half of the distance between centre of nuclei of two covalently bonded atoms.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX - INORGANIC VOLUME 1-Exercise very short
  1. Which of the following requires highest energy: a.M((g)) rarr M((g))...

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  2. How do atomic radius vary in a period and in a group? How do you expla...

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  3. Define (a) ionic radii and (b) covalent radii.

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  4. Why do noble gases have comparatively large atomic sizes?

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  5. Define ionisation energy . What is its value for a hydrogen atom ?

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  6. How does ionisation energy vary (a) down the group and (b) along the p...

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  7. A and B belong to same group of periodic table. A has higher atomic nu...

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  8. The problem of position of isotopes in the periodic table was avoide...

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  9. Two different elements may have same mass number but not the same .

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  10. When compared to lithium, it is easier to remove valence electron from...

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  11. Chlorine has more electron affinity than fluorine.

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  12. Among (the non-radioactive) halogens the element that has the lowest e...

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  13. Name the radioactive element of group 17 and group 18 .

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  14. Among Li,Na,K,Rb,Cs, the element with the lowest ionisation energy is ...

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  15. Electron Gain Enthalpy

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  16. Generally electron gain enthalpy on going down a group, and on going...

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  17. Why is the second electron gain enthalpy negative (i.e. energy is abs...

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  18. Give reasons for the following : Fluorine has lower electron gain en...

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  19. Isoelectronic species have the same number of .

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  20. Lanthanides and actinides belong to block of the periodic table.

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