Respuesta :
Answer:
Mercury(Hg)
Explanation:two elements  that are liquid at room temperature are Mercury and Bromine.
However,since the unknown element can conduct electricity,it is a metal,which is Mercury regarded as the liqud metal.
Mercury reacts with Oxygen at room temperature to form Mercury(ii)oxide HgO
2Hg+02→2HgO
Mercury(i) nitrate reacts with Hydrochoric acid to form Mercury chloride in the reaction below
HgNO3 + 2 HCl → HgCl2 + H2O + NO.
The identity of the element would be mercury.
Properties of Mercury
There are only two elements that are liquid at room temperature - bromine and mercury.
Bromine cannot form BrCl2 with chlorine or BrO with oxygen.
Mercury has the ability to form a chloride salt with chlorine in the form of HgCl2.
Mercury also forms an oxide with oxygen in the form of HgO.
More on the properties of mercury can be found here: https://brainly.com/question/4353580