As melts cool their viscosity increases (they lose their mobility and get stiffer)even before they start to crystallize because ________.
A)all of the sodium and potassium escape
B)their ions become more disordered
C)the silica tetrahedra in the melt start to link up and make larger and stronger units
D)they increase in volume

Question

Quizplus · Accepted Answer

When melts cool, the silica tetrahedra in the melt start to link up and make larger and stronger units. This results in an increase in viscosity, even before crystallization begins.

As Melts Cool Their Viscosity Increases (They Lose Their Mobility