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Elements of Group 1 and 2 — Chemistry STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryElements of Group 1 and 21 Mark
MCQ
Which among the following elements has only one electron in valence shell?
  • ✓
    $\mathrm{Ra}$
  • B
    $\mathrm{Ca}$
  • C
    $\mathrm{Rb}$
  • D
    $\mathrm{Ba}$
✓

Answer

Correct option: A.
$\mathrm{Ra}$

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