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Which of the following statements are co...

Which of the following statements are correct ?

A

Helium has the highest first ionisation enthalpy in the periodic table

B

Chlorine has less negative electron gain enthalpy than fluorine

C

Merucry and bromine are liquids at room temperature

D

In any period, atomic radius of alkali metal is the highest

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NARAYNA-PERIODIC TABLE -All Questions
  1. Which of the following sequences contain atomic numbers of only repres...

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  2. Which of the following elements will gain one electron more readily co...

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  3. Which of the following statements are correct ?

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  4. In which of the following options order of arrangement does not agree ...

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  5. Ionic radii vary in

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  6. An element belongs to 3rd period and group 13 of the periodic table. W...

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  7. In the modern periodic table, elements are arranged in order of increa...

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  8. In the modern periodic table, elements are arranged in order of increa...

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  9. In the modern periodic table, elements are arranged in order of increa...

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  10. In the modern periodic table, elements are arranged in order of increa...

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  11. In the modern periodic table, elements are arranged in order of increa...

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  12. Medeleeff corrected the atomic weight of :

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  13. Zero group was introduced by

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  14. According to Mendeleef's periodic law, the properties of elements are ...

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  15. Total number of ground in Mendeleef's table

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  16. In Mendeleef table, the triad of VIII group is

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  17. Number of short periods in Mendeleef table

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  18. The properties of the following elements were predicted by Mendeleeff ...

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  19. The number of elements known when Mendeleef presented periodic table i...

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  20. The element 'Sc' is known long back as

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