18 Metallic Bonding Flashcards
only metal elements are involved
metallic bonding
found in the middle and on the left-hand side of the periodic table
metals
valence electrons sperate from their atoms and become delocalized, creating a _____
sea of electrons
atoms become positive ions; become attracted to electrons
metallic bonding
why positive metal ions do not repel each other
sea of electrons/delocalized electrons
high melting and boiling points because these bonds are very strong
metallic bonding
good conductors of electricity and heat because of the delocalized electrons
metals
why are metals good conductors of electricity and heat?
delocalized electrons pass electrical charge and thermal energy
when a metal is hit, layers of it ________
slide over each other
bonds are ______ when a metal’s shape is changed
shifted but not broken
most metals are ____ because of delocalized electrons
lustrous (shiny)
metals can be made stronger by adding another element when the metal is molten
alloying
atoms of new element spread through crystal structure
alloying
substance formed from alloying
alloys
most abundant metal in earth’s crust
aluminum (Al)
lightness and strength make it good for aircrafts, spacecrafts, soft drink cans, foil, and automobile wheels
aluminum (Al)
2nd most abundant metal in earth’s crust
iron (Fe)
strong and abundant metal in earth’s crust
iron (Fe)
by-product of Iron (Fe) and Carbon (C)
steel
used in railways, roads, subways, bridges, buildings, skyscrapers, ships, and cars
steel
made of iron (Fe), carbon (C), and nickel (Ni) or chromium (Cr)
stainless steel
low cost and high resistance for corrosion and high temps
stainless steel
used in utensils, sinks, cookware
stainless steel
good conductor of electricity and good for ductility
copper (Cu)
reddish-orange metal
copper (Cu)
second to silver (Ag) as best electrical conductor
copper (Cu)
copper (Cu) mixed with Zinc (Zn)
brass
used for musical instruments, padlocks
brass
copper (Cu) mixed with Tin (Sn)
bronze
sculptures and medals; industrial like bushings and bearings
bronze
fuels nuclear reactors and power plants as a source of energy
uranium (U)
known for outstanding durability, significant rarity, extravagant beauty
precious metals
white-grey metal
platinum (Pt)
even more valuable then silver (Ag) and gold (Au) because of its many uses
platinum (Pt)
precious metal, treasured since earliest times
gold (Au)
often mixed with other metals (like Ag, Ni, Pt, Cu) to increase strength/alter color
gold (Au)
most reflective metal
silver (Ag)
best conductor of heat and electricity when pure
silver (Ag)
used for centuries to make jewelry and other items that display its luster
silver (Ag)
