Which Element in Period 2 Has the Highest Density in Its Standard State?

[ncm2]

Homework Statement

Which of the elements, from the second period, has the highest density in its standard state?

Homework Equations

Standard state is gas at 1 atm, concentration of 1 M for liquid, or pure substance at 25C and 1 atm.

The Attempt at a Solution

I thought that N, O, F, and Ne could be removed from possibilities because they are gases. Then I looked it up and found Boron had the largest density, but that was incorrect.

 

[Redbelly98]

What did you find for densities for all the solids in that period?

 

[ncm2]

I found:
Li: .534 g/cm^3
Be: 1.85 g/cm^3
B: 2.34 g/cm^3
C: 2.267 g/cm^3
N: .00125 g/cm^3
O: .00149 g/cm^3
F: .001696 g/cm^3
Ne: .0008999 g/cm^3

 

[Borek]

I would say boron in the standard state is the densest.

There is a little catch here - diamond (which is a pure carbon) has much higher denisty, something like 3.5 g/mL. But diamonds are not thermodynamically stable - they convert to graphite. Conversion is so slow, that for all practical purposes diamonds are stable - but thermodynamically they are not. Thus they are not standard state of the carbon.