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NEETChemistryClassification of Elements and Periodicity in Properties

What determines the placement of hydrogen in the Periodic Table?

Options

  1. AIts atomic number
  2. BIts mass number
  3. CIts electron configuration
  4. DIts unique properties

Correct answer

D. Its unique properties

Step-by-step solution

Hydrogen has only one s-electron and hence can be placed in group 1 (alkali metals). It can also gain an electron to achieve a noble gas arrangement and hence it can behave similar to a group 17 (halogen family) elements. Because it is a special case, we shall place hydrogen separately at the top of the Periodic Table.

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