What elements and/or substances without water are liquid at room temperature? [closed]








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I was thinking about liquids, and I started to wonder theses related questions:


1) Besides mercury, what elements are naturally liquid at room temperature?


2) What naturally found family of substances/mixtures that do not contain $\ce{H2O}$ are naturally liquid at room temperature?




This question is a bit broad in terms of the sheer amount of chemical compounds and mixtures that are liquid at room temperature. Examples include:


**Compounds**  

Acids, bases, many hydrocarbons (e.g. hexane) and many more


**Mixtures**  

Crude oil, aqua regia and many more


In terms of **elements**, there are only two that are liquid at [room temperature](http://en.wikipedia.org/wiki/Room_temperature) (say about 20 °C or 293 K):


* [Mercury](http://en.wikipedia.org/wiki/Mercury_(element)) (as you identified).
* [Bromine](http://en.wikipedia.org/wiki/Bromine)


[Francium, cesium, gallium and rubidium](http://antoine.frostburg.edu/chem/senese/101/periodic/faq/liquid-elements.shtml) are close, with melting points at 300 K, 301.59 K, 303.3 K and 312.46 K respectively.


LennTech provides a list [The elements of the periodic table sorted by melting point](http://www.lenntech.com/periodic-chart-elements/melting-point.htm)


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