Question

Which of the following is non-metallic ?
(a) B
(b) Be
(c) Mg
(d) Al

Answer 1

Answer:

B boron is non metallic

Explanation:

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Answer 2

The correct option is a.

• Be is an alkaline earth metal and has atomic number 4.
• Mg is an alkaline earth metal and has the atomic number 12.
• Al is metal and has the atomic number 13. It has high and electrical and thermal conductivity.
• Boron is a gas and non-metal. It has the atomic number 5.
• Thus Boron is non-metallic.