compound
element
colliod
It is actually called colloid.
a heterogeneous mixture
heterogenous
A colloid is not a single compound; it is a mixture with properties between those of a solution and fine suspension.
A solution has the smallest particles, of the mixtures that you list.
Suspension
Sand is a mixture and rarely is only one compound.
suspension
colloid
compound
A colloid.
element
colliod
It is actually called colloid.
a heterogeneous mixture