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Per NCERT §3.6.5, which elements bordering the metal/non-metal staircase are called METALLOIDS (semi-metals)?
ASilicon, germanium, arsenic, antimony, tellurium
BSodium, potassium, calcium
CIron, copper, zinc
DHelium, neon, argon
Answer & Solution
Correct answer: A. Silicon, germanium, arsenic, antimony, tellurium
Per NCERT §3.6.5, metalloids = Si, Ge, As, Sb, Te (and sometimes Po). Show mixed metal/non-metal properties.
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