Multiple choice

Which of the following is not a metal?

  1. iron

  2. zinc

  3. mercury

  4. boron
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Boron is a metalloid (element with properties between metals and non-metals), not a true metal. Iron, zinc, and mercury are all metals - iron and zinc are transition metals, while mercury is a liquid transition metal. Boron lacks the characteristic metallic properties like electrical conductivity, malleability, and luster.

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