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In the periodic table, inversion of atom...

In the periodic table, inversion of atomic weights took place in this pair

A

Argon - Potassium

B

Boron - Scandium

C

Hydrogen - Helium

D

Beryllium - Boron

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A
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AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -2A (MENDELEEFF.S PERIODIC TABLE)
  1. The triad not present in Group VIII of Mendeleeff's table

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  2. In the periodic table, inversion of atomic weights took place in this ...

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  3. The period that contains only gaseous elements is

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  4. The element which belong to 3rd period and IVA group of periodic table...

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  5. Assertion: According to Mendeleeff, periodic properties of elements is...

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  6. Pair of elements with the following atomic numbers have the same chemi...

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  7. The sub-shells filled one by one for 4th period elements are

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  8. The starting element and last element in the largest period in modern ...

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  9. Which of the following has both members from the same period of the pe...

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  10. Atomic number of nitrogen is 7. The atomic number of the third member ...

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  11. Element with atomic number 38, belongs to

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  12. Set of elements with the following atomic numbers belong to the same g...

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  13. Which of the following pairs has both members from the same group of t...

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  14. The elements with atomic number 10, 18, 36, 54 and 86 are all

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  15. Which of the following pairs has elements containing same number of el...

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  16. The period that includes all blocks of elements is

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  17. Among s-block metals and transition metals, which are more metallic?

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  18. Element with atomic number 52 belongs to

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  19. The general electronic configuration of f-block elements is

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  20. The common oxidation state exhibited by inner transition elements usua...

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