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Atomic Structure. — Science STD 8 — Question

Tamilnadu BoardEnglish MediumSTD 8ScienceAtomic Structure.1 Mark
MCQ
The valency of which of the element is zero.
  • A
    iron
  • B
    hydrogen
  • ✓
    helium
  • D
    oxygen
✓

Answer

Correct option: C.
helium
helium

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