Chemistrymedium · Past Paper
Which element is located in Period 3 and Group IIA (Group 2)?
ABeryllium
BMagnesium
CCalcium
DAluminium
✓ Correct Answer: B — Magnesium
Magnesium (At No. 12) has configuration 2, 8, 2, placing it in period 3 and group 2.
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