Question

Which best characterizes a crystal?
a number of high speed particles moving randomly
***a dense substance that is hard and incompressible ***
a high-energy state of matter made up of a swirling, ionized gas
a loose association of particles moving past one another

Answer 1

a high - energy state of matter made up of a swirling, ionized gas

Halite crystal is growing and can attach very quickly and eventually form a smooth, stable faces where new atoms can easily attach themselves.

Answer 2

a dense substance that is hard and incompressible