Metallic Bonding

• Q: What metal did ancient people used to use as a weapon but it was too soft?

  A: Copper
• Q: What did the ancient people of Greece mix copper with?

  A: Tin
• Q: What material do you get when you combine copper and tin?

  A: Bronze
• T or F: Metals can be bonded with one another since they have enough valence electrons to get stable on their own

  A: F
• Q: Metals are solid at room temperature except for what two elements?

  A: Mercury and Gallium
• T or F: Metals can absorb heat and electricity quickly

  A: T
• Q: What color represents metals in the periodic table?

  A: Yellow
• Q: When metals are packed together, what shape do they form that appears as if they are ionic bonds?

  A: Lattice
• T or F: When metals stick together, their electrons stick together, too

  A: T
• Q: Why are metallic bonds given stability?

  A: Overcrowding of electrons which cause them to move less
• Q: What makes this bonding special compared to the others?

  A: The electrons separate themselves and have stability which forms a sea of electrons
• Q: What are the positive and negative attractions in metallic bonds?

  A: Positive = metals

  Negative = sea of electrons/electron cloud
• FTB: The metal atoms, losing their electrons become _ charged

  A: Positively
• FTB: The sea of electrons become _ charged, and they attract each other

  A: Negatively
• Q: What must happen to the electrons of metal atoms if they will form a sea of electrons?

  A: They will delocalize
• Q: Describe the properties of metallic bonding?

  A: 1. Conductivity - allowing heat and electricity to pass through

  2. Malleability - can be hammered into sheets without breaking

  3. Ductility - can be drawn into thin wires without breaking

  4. Luster - shiny appearance

  5. High melting and boiling points
• Q: What are alloys?

  A: Mixture of metals that are responsible for the marvels of engineering today
• Q: What are the examples of alloys given?

  A: 1. Steel

  2. Brass

  3. Stainless Steel

  4. Aluminum alloys

  5. Casting alloys
• Q: What is steel a mixture of?

  A: iron and carbon
• Q: Where is steel used in?

  A: almost everywhere
• Q: What is brass a mixture of?

  A: copper and zinc
• Q: Where is brass used in?

  A: Instruments, decor, jewelry, plumbing fitting, electrical connectors
• Q: What is stainless steel a mixture of?

  A: Iron and chromium nickel
• Q: Where is stainless steel used in?

  A: Cutlery, kitchen appliances, cookware, and medical instruments
• Q: What is aluminum alloys a mixture of?

  A: Aluminum and copper/zinc
• Q: Where is aluminum alloys used in?

  A: aircraft parts, automative components, beverage cans, construction materials, and consumer electronics
• Q: What is casting alloys a mixture of?

  A: Aluminum and silicon
• T or F: Casting alloys are one of the most difficult to mold among all

  A: F
• Q: Where is casting alloys used in?

  A: Dental fillings, automative parts, and small handmade metallic objects
• T or F: Metallic elements give out their small amount of electrons but create a sea of electrons and stick together and become strong as a group

  A: T
• Q: Between conductivity and low melting point, which one is a metallic property?

  A: Conductivity
• T or F: Metals cannot be bonded with each other

  A: F
• Q: Between metals and the sea of electrons, which is the negatively charged region in a metallic bond?

  A: Sea of electrons
• T or F: Metal atoms and sea of electrons attract each other

  A: T
• Q: Which alloy is used in almost everything?

  A: Steel
• Q: Which alloy is used in making dental fillings?

  A: Casting alloys
• Q: Which alloy is used in making tuba instruments?

  A: Brass
• Q: Which alloy is used in making medical instruments?

  A: Stainless steel
• Q: Which alloy is used in making beverage cans?

  A: Aluminum alloys