Which of the following is NOT a main classification of solids?
Analysis & Theory
Liquid crystals are a separate phase of matter and not a solid classification.
What characterizes a crystalline solid?
A
Irregular arrangement of atoms
B
No definite melting point
C
Long-range order in atomic arrangement
D
No sharp X-ray diffraction pattern
Analysis & Theory
Crystalline solids have a regular, repeating atomic structure, resulting in long-range order.
Which of the following is an example of an amorphous solid?
Analysis & Theory
Glass is an amorphous solid because it lacks a long-range ordered crystal structure.
Which type of solid is typically hard, brittle, and has high melting points?
Analysis & Theory
Ionic solids are hard and brittle due to strong electrostatic forces between ions.
What is a key property of metallic solids?
A
Poor electrical conductivity
C
Free movement of electrons
Analysis & Theory
Metallic solids have a 'sea of electrons' that allows free movement, leading to electrical conductivity.
Which solid is held together by van der Waals forces or hydrogen bonding?
Analysis & Theory
Molecular solids are made of molecules held together by weak van der Waals forces or hydrogen bonds.
Which of the following is a covalent network solid?
Analysis & Theory
Diamond is a covalent network solid where carbon atoms are bonded in a 3D lattice.
What is the structure of amorphous solids like?
Analysis & Theory
Amorphous solids have a random and disordered arrangement of atoms or molecules.
Which of the following is a typical property of amorphous solids?
Analysis & Theory
Amorphous solids lack long-range order and do not have a sharp melting point.
Which solid type is best described as malleable and ductile?
Analysis & Theory
Metallic solids are malleable and ductile due to the delocalized electrons that allow layers to slide.