Delocalized Electrons
What makes metals so different from nonmetals is their unique arrangement of ___________.
Electrons
_______________ is the ability to be drawn into wires.
Ductility
Heat and electricity
What is the 3D structure of pure metals?
Crystalline structure
True or False? Natural crystals are ALWAYS perfect.
FALSE
Why can't metal atoms form covalent bonds with their neighboring atoms?
too few electrons
_____________ is the ability to be hammered or pressed into shapes.
Malleability
What is it called when a material can conduct heat?
thermal conductivity
The microscopic crystal structure of a metal largely determines its __________________________.
macroscopic bulk properties
Errors in the crystal structure of a metal are called
point defects
electrons that don't stay close to their original atom in metals are known as
delocalized electrons
What property of electrons in metals explains both ductility and malleability?
mobility (of delocalized electrons)
What is it called when a material can conduct electricity?
electrical conductivity
What are the 3 packing arrangements that most metals adopt?
body-centered cubic, face-centered cubic, and hexagonal close-packed.
The presence of defects in the crystalline structure of metals can strongly influence many of the crystal's ___________.
properties.
Electrons in metals move around freely and hold the metal atoms in a _______________ structure.
Crystalline
Drifting electrons ____________ metal cations from each other.
insulate
cookware (pots and pans)
Young's modulus is a measure of a solid material's stiffness. Based on the table given on page 232 in the textbook, what structure would we expect an unknown metal to have if its Young's modulus is 62?
FCC
What are the three types of point defects mentioned in the book?
interstitial
substitution
vacancy
Metal atoms do not form a ____________ bond.
When pressure is applied to metal, the cations easily change position, so the metal changes shape without breaking. However, in _________ compounds, pressure tends to push the ions closer together which causes ionic repulsion and makes the crystal shatter.
ionic
Light causes the free electrons in metals to become excited and move! As they move, the release that excited energy as light. This is called ___________, and it is the reason why metals are _________.
luster; shiny
When the planes of atoms in a metal crystal are closely packed, it tends to be easier for them to ________________.
Colorful gemstones are created by _________ __________.
point defects