full is empty ? yes, it is!

it is 2am. and a thought.
is full empty ?

Optimist : glass is half full. Pessimist : glass is half empty. Engineer : glass  has twice the volume it is holding.

now, what is the hardest substance ? for now, am going with diamond, keeping aside the present day scientific advancements. mohs scale of mineral hardness
diamond, is hardest. an allotrope of carbon. so is graphite. but is soft. reason : difference in spacial arrangement of carbon atoms.

http://en.wikipedia.org/wiki/File:Diamond_and_graphite2.jpg

in diamond, the carbon atoms are arranged in the form of cube at a length of 0.15 nm, forming covalent bond. the 4 valence electrons of 1 atom are shared with 4 of the other carbon atom.

dia of each electron : 0.0000056 nm

roughly 200000 electrons can be fitted in that cube length.

to get an estimate of the distance in our units... our avg height is 1.5m and the next person is roughly at 400 kms away. practically, the space in between is empty.

take water in the glass. at the angstrom level, it is empty. so is gas. so is everything. 

there is vast emptiness.

so, here are some questions / answers / confusions

is hard hard ? is soft hard ? 

but, full is definitely empty.