Chemistry · Periodic Classification of Elements
Element A, which has an anomalous position in the Modern Periodic Table, has an electronic configuration similar to alkali metals but exists as diatomic molecules. B is the element that comes immediately after sodium in the third period and belongs to group C in the modern periodic table. Identify A, B, and C.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A = Lanthanoids, B = Ne, C = 3
- 2A = Helium, B = Al, C = 13
- 3A = Lithium, B = K, C = 1
- 4A = Hydrogen, B = Mg, C = 2✓
Correct answer
A = Hydrogen, B = Mg, C = 2
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