একমাত্র অ-ধাতব যা ঘরের তাপমাত্রায় তরল থাকে তা হল ________।

Bromine is the only non-metal that is liquid at room temperature; it is a red-brown, fuming liquid. Mercury is also liquid but is a metal, chlorine is a gas, and gallium is a metal that melts at about 30 °C.