Quiz 3 - Chemistry for Engineers

__________ are determined by metallic bonding – force, holding together the atoms of a metal. Each of the atoms of the metal contributes its valence electrons to the crystal lattice, forming an electron cloud or electron “gas”, surrounding positive metal ions. These free electrons belong to the whole metal crystal.

• Metal crystal structure

• Metal crystal structure and specific metal properties

• Specific metal properties

___________ is the smallest portion of a crystal lattice that shows the three-dimensional pattern of the entire crystal.

• Metal crystal structure

• Unit cell

• Face-centered cubic cell

__________ consists of atoms arranged in a cube where each corner of the cube has a fraction of an atom with six additional full atoms positioned at the center of each cube face. The atoms at the corner of the cube are shared with eight other unit cells.

• Metal crystal structure

• Body-centered Cubic

• Face-Centered cubic unit cell structure

__________ unit cells indicate where the lattice points appear not only at the corners but in the center of the unit cell as well. The atoms touch one another along the cube’s diagonal crossing, but the atoms don’t touch the edge of the cube. All atoms are identical.

• Metal crystal structure

• Body-centered Cubic

• Face-Centered cubic unit cell structure

__________ is a mixture of two or more elements, where at least one element is a metal.

• Steel

• Alloy

• Metal

__________ is the breaking of a compound into elements or simpler elements.

• Decomposition reaction

• Decomposition temperature

The ____________ of a substance is the temperature at which the substance chemically decomposes.

• Decomposition temperature

• Decomposition reaction

Most metals are found in the Earth's crust combined with the other elements in rock known as __________.

• ORE

• Mining

• Rock

_____________ is the breakdown of a metal when exposed to the environment. A metal corrodes when it reacted with water and oxygen from the environment to form their respective oxides.

• Corrosion

• Rusting

____________ defined as simple molecule with two or more binding sites through which it forms covalent linkages with

other monomer molecules to form the macromolecules.

• Monomers

• Polymers

• Synthetic Polymers