Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
Question
An element belongs to 5th period and 3rd group, identify the element.
✓
Answer
$Y(39): 1 s^2 ~2 s^2 ~2 p^6 ~3 s^2 ~3 p^6 ~4 s^2 ~3 d^{10} ~4 p^6 \underline{5 s^2} \underline{~4 d^1}$. The element is Ytterium(39).
It belongs to 5th period and 3rd group due to 3 valence electrons.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.