At STP, which element is brittle and not a conductor of electricity?

Question

At STP, which element is brittle and not a

conductor of electricity?

Choices:

(1) S (3) Na

(2) K (4) Ar

Answer: (1)S

I read that non-metals are brittle and poor conductors of electricity but why is it that S is the answer and not Ar?

Answer 1

you are right , non-metals are brittle.

but for brittle property, they need to be solid.

sulphur is solid at STP.

Argon(Ar) is a gas at STP, so it cannot be brittle.

Answer 2

Argon is a gas at STP(its in the noble gasses)