Crystalline Solids

It is the network formed from the combination of unit

cels.

• Unit cell

• Crystal Lattice

• Shape

• Rigidity

Wood is a solid that has different values of refractive index. What type of solid is it, and what property is being exhibited ?

• Amorphous-Anisotropy

• Crystalline- Anisotropy

• Crystalline- Isotropy

• Amorphous-Isotropy

What does it mean when a solid has a sharp melting point?

• It will turn into a gaseous state at a defined value of temperature

• It will melt over a range of temperature

• It will completely melt at a fixed value of temperature

• It will have sharp edges before it turns to liquid

Tags

NGSS.MS-PS1-4

A friend in your chemistry class is struggling to understand why crystalline solids are grouped into four main types: network, molecular, ionic, and metallic. Which explanation below will BEST help him begin to understand why chemists might have these groups?

• Crystalline solids all share a lattice structure, but have different densities. Chemists use the groups to organize the solids by density.

• Crystalline solids all share a lattice structure and the same types of bonds, but are composed of different elements. These elements affect the way the solid conducts heat and electricity.

• Crystalline solids all share a lattice structure, but behave differently under similar conditions.

• Crystalline solids all share a lattice structure, but the bonds that hold them together at the atomic level differ. The elements that make up the solids also differ. These differences affect how a solid conducts heat and electricity.

Which type of solid typically has the lowest melting point of the four types of crystals?

• Ionic

• Molecular

• Metallic

• Covalent Network

Which type of solid has mobile electrons in the crystal (sea of electrons)?

• Ionic

• Molecular

• Metallic

• Covalent Network

Which is an example of an ionic crystal?

• Quartz

• NaCl

• Ammonia

• Iron

Which is an example of a metallic crystal?

• Quartz

• NaCl

• Ammonia

• Iron

Ionic solids are a subset of which type of solids?

• amorphous

• atomic

• crystalline

• network

Which has a more clearly defined shape?

• amorphous solid

• crystalline solid