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Question

Which of the following is non-metal?
  1. In
  2. B
  3. Th
  4. Ga

A
Ga
B
In
C
B
D
Th
Solution
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Becuase of the small size of Boron, it does not show the tendency to lose the electron easily, so it does not act as metal so it acts like a non-metal and the remaining given options acts like metals as they have the tendency to lose the electrons
Hence option D is correct.

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