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Chapter 2: Problem 88

Of the 118 elements known, only two are liquids at room temperature \(\left(25^{\circ} \mathrm{C}\right) .\) What are they? (Hint: One element is a familiar metal and the other element is in Group 7A.)

Short Answer

Expert verified
The two elements that are liquids at room temperature (25 degrees Celsius) are Mercury and Bromine.

Step by step solution

01

Identify the known liquid metal element

First, we will tackle the easier hint provided. It is known that Mercury (Hg) is the only metal that is liquid at room temperature. Thus, Mercury is the first element.
02

Identify the liquid element in Group 7A

In the periodic table, Group 7A is comprised of Halogens. The only halogen that is liquid at room temperature is Bromine (Br). So, Bromine is the second element.

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Pair the following species that contain the same number of electrons: \(\mathrm{Ar}, \mathrm{Sn}^{4+}, \mathrm{F}^{-}, \mathrm{Fe}^{3+}, \mathrm{P}^{3-}, \mathrm{V}, \mathrm{Ag}^{+}, \mathrm{N}^{3-}\)

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