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Periods are based on the present in an ...

Periods are based on the ______________ present in an atom.

A

electrons

B

no.of orbits

C

no.of main shells

D

colours

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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS-THE PERIODIC TABLES-EXERCISE
  1. The elements with similar outer shell configuration are placed in a

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  2. Number of vertical columns in the modern periodic table are (As per IU...

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  3. Periods are based on the present in an atom.

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  4. 4f elements are called

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  5. of an element was defined as combining power of an element with respec...

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  6. The atomic size in a group from top to bottom

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  7. In which units ionizations energy can be expressed ?

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  8. The minimum energy required to remove an election from the outer most ...

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  9. The energy required to remove an electron from unipositive ion is call...

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  10. The energy liberated when an electron is added to a netural gaseous at...

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  11. According to Mulliken, electronegativity =

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  12. Electronegativity values... along a period from left to right.

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  13. The number of sub-groups in each group of Mendeleeff's periodic table ...

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  14. Mendeleeff tried to explain similarities of elements in the same group...

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  15. Eka silicon is now known as

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  16. Eka means

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  17. The anomalous series of elements of mendeleev's periodic table ...

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  18. The number of positive charges in the atom of an element is the of th...

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  19. The group elements are also called as

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  20. Elements from ^(58)Ce to ^(71)Lu are called

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