Periodic Classification of Elements — Science STD 10 — Question
CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
What type of oxide would Eka$-$aluminium form?
A
$EO_3$
B
$E_3O2$
✓
$E_2O_3$
D
$EO$
✓
Answer
Correct option: C.
$E_2O_3$
Eka$-$aluminium is in the same group as Aluminum, i.e. Group $13$. Hence, there are $3$ electrons in its outermost orbit. So, it can lost $3$ electrons to form a bond. Oxygen has $6$ electrons in its outermost orbit which means it can gain $2$ electrons to form a bond.
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