The answer would certainly be Thallium. This is an facet with Tl together its chemical symbol and atomic number 81. This soft gray post-transition steel is no originate totally free in nature. As soon as inaccessible, thallium look prefer tin, however tarnishes as soon as unprotected come air.

You are watching: Which element is a liquid at 758k and standard pressure



option (4) thallium.

Explanation:

1) You have to look in ~ the common boling and mleting clues of the elements.

2) to be liquid the typical melting suggest must be reduced than 758 K and the normal boiling allude must be better than 758 K.

3) The look in ~ the data in a handbook of properties or in internet, and build a table.

4) The provided temperature, 758K, is 758 - 273.15 = 484.85 °C.

Element regular melting typical boiling State at 484.85 °C

point (°C) point (°C)

(1) yellow 1064 2700 hard

(2) silver- 961.8 2162 solid

(3) platinum 1768 3825 solid

Then, the only element of the options whose melting allude is much less than 758 K (484.85) and its boiling suggest is greater than that, in ~ 1 atm is thallium. So, it is liquid.



Answer from: laneake96
The prize is thallium good luck
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