Too good to let go by

[Ken Mayer]

> > Wait a minute.  I thought hydrogen was a metal.

Hydrogen is a Group 1-A element, together with lithium, sodium, etc.  The
"light metals" begin with lithium and beryllium, downward through the
periodic table.  Hydrogen is not classified as a metal because does not
form a solid containing mobile electrons.

> Only under the physical parameters that make it a metal. Is glass a
> solid?

No, it's a supercooled liquid.  It has a viscosity (very high, of course).
If you measure the thickness of an old window pane, it will be measurably
thicker at the bottom.  It also changes its internal structure over time.
New glass cuts very easily, while old glass tends to shatter.

Ken
:-)