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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
The electron distribution in an aluminium atom:
  • ✓
    $2, 8, 3$
  • B
    $2, 8, 2$
  • C
    $8, 2, 3$
  • D
    $2, 3, 8$
✓

Answer

Correct option: A.
$2, 8, 3$

Aluminium atom has $13$ protons and $13$ electrons.
$K L M$
Therefore, Electronic configuration of ${ }_{13} \mathrm{AI} = 2, 8, 3$

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