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MHT CET20244 May 2024Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following elements belongs to first group and fifth period of periodic table?

Options

  1. ARubidium
  2. BStrontium
  3. CCaesium
  4. DBarium

Correct answer

A. Rubidium

Step-by-step solution

(1) Rubidium (Rb): Rubidium is in Group 1 (alkali metal) and Period 5. This is a correct match. (2) Strontium (Sr): Strontium is in Group 2 (alkaline earth metals), not Group 1. (3) Caesium (Cs): Caesium is in Group 1, but it is in Period 6, not Period 5. (4) Barium (Ba): Barium is in Group 2 (alkaline earth metals), not Group 1.

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