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Name the radioactive element of group 17...

Name the radioactive element of group `17` ________ and group `18` _____________.

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Astatine `(At)`, Radon`(Rn)`
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CENGAGE CHEMISTRY-APPENDIX - INORGANIC VOLUME 1-Exercise very short
  1. Chlorine has electron affinity than fluorine.

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

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

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

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  5. Electron Gain Enthalpy

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

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

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  8. Why fluorine has lesser electron gain enthalpy than chlorine?

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  9. Isoelectronic species have the same number of .

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

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  11. Generally, the atomic size along a period gradually decreases due to i...

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  12. The formula for fluoride of carbon is .

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  13. The solubility of alkali metal carbonateas one goes down the group.

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  14. The electronic configuration of Re^(3+) is (Xe)4f^(14)5d^(4), the numb...

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  15. Lother Meyer atttempts to classify the elements by plotting graph betw...

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  16. Second period ends with .

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  17. The first transition series is called transition series.

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  18. Why do alkali metals have lowest ionisation energy?

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  19. Why are lanthanides and actinides place at the bottom of the periodic ...

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  20. How do the basicity and solubility in water vary from Be(OH)(2) to Ba(...

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