chem 125 PSA 2.1
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27 Terms
In metal bonding, What are metal cationic atoms surrounded by
By a sea of electrons that are only loosely associated with the metal nuclei
What is the electronegativity for most metals
Low electronegativity
What do free electrons on the surface of a material do
They bounce back and make the material appear shiny
Would you expect metals to reflect light
Yes, metals are lustrous and shiny
What type of bonding does solid matter held in place by the electrostatic attraction forces between positive ions and a “sea” of freely moving electrons describe?
Metallic bonding
What is ductility
The term for the ability of a metal to be pulled into a wire
What kind of metal is gold
A soft metal
How can metal be moved and warped
They are referred to as ductile because they can be plastically transformed transformed without breaking the bonding: molded and shaped, hammered into thin sheets, or drawn into wire
What happens to atoms if stress is put on metal
The atoms roll over each other into a position
Would a bumpy or smooth surface be easier for atoms to roll over
Smooth
What does BCC packing look like?
What does FCC packing look like?
Which packing motifs will be easier for a layer of atoms to roll over? BCC or FCC
FCC
Where are metals on the periodic table?
Where are metalloids/semimetals?
Are Na, Zn, Ag, Br, S, Ge, W, H, At, and Kr metals semimetals or nonmetals
Metal, metal, metal, nonmetal, nonmetal, metalloids, metal, nonmetal, metalloids, nonmetal
Where are main group metals on the periodic table?
They are the metals that are in group 13-15 and group 1-2
Where are the main group nonmetals
Hydrogen and all the nonmetals in group 14-18
Where are main group semimetals on the periodic table?
B, Si, Ge, As, Sb, Te, Po (between metals and nonmetals)
Where are transition metals on the periodic table?
They are in group 3-12 or the middle section
Where are inner transition metals on the periodic table?
The two rows at the bottom of the periodic table
What is the word to describe a metal 3d sculpture
A lattice
What does a cubic base look like?
What does a hexagonal base look like?
How much of an atom is shown here
1/8
How much of the atom is shown here
1/4
How much of the atom is shown here?
1/2