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The Periodic Table — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYThe Periodic Table2 Marks
Question
Write the electronic configuration of the first two alkaline earth metals.
✓

Answer

Electronic configuration of the first two alkaline earth metals:
$_4Be: 1s^22s^2$
$_{12}Mg: 1s^22s^22p^63s^2$

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