Properties of Metals, Nonmetals, and Metalloids

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• Properties of Metals, Nonmetals, and Metalloids

lt- To view powerpoint go to link via the QR code
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• Metals are located to the left and below the
  diagonal line in the periodic table.

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Properties of Metals

• Metals are usually solids at room temperature

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Mercury is the exception
http//www.youtube.com/watch?v31CE2BYicyU
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• Metals are good conductors of heat and
  electricity

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(No Transcript)
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• High melting points and boiling points (except Hg
  and Ga)

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Gallium has a melting point of only 86 F.
https//www.youtube.com/watch?vNzoi9m3t4uM
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• High densities (except some group 1 metals)

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• Metals have luster, they are shiny and reflect
  light

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• Malleable can be bent or pounded into sheets

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• Ductile can be stretched into wire without
  breaking

http//www.youtube.com/watch?vc382ziUpbbc
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Wires on a suspension bridge are made of ductile
metal
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Chemical properties of metals

• Most metals can rust

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Chemical properties of metals

• Most metals react easily with acids

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Nonmetals are located to the right of the stair
step line.
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Properties of Nonmetals

• The nonmetals exist in all three of the states of
  matter at room temperature
• gases (such as oxygen)
• liquids (such as bromine)
• solids (such as carbon)

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• Nonmetals are not able to conduct electricity or
  heat very well.

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• Nonmetals have much lower melting and boiling
  points than metals. (Consider all of the gases
  on the non-metal side)

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• Nonmetals are not nearly as dense as metals.

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• The nonmetals have no metallic luster, and do not
  reflect light.

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• Nonmetallic elements are very brittle, and cannot
  be rolled into wires or pounded into sheets.

Sulfur powder
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Hydrogen- a non metal

• The Group 1 Nonmetal
• Most of the hydrogen found in the world is found
  in water.

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Metalloids are located on the staircase line,
dividing metals from non metals.
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Properties of Metalloids

• Have a mixture of metallic and nonmetallic
  properties.
• Semi-conductors Can conduct heat and
  electricity to some extent.

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Review video of metals, nonmetals, and metalloids

• 516 length

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Review Questions

• 1. Identify the following as metals, nonmetals,
  or metalloids using their location on the
  periodic table.
• (a) silicon
• Si- metalloid
• (b) fluorine
• F- nonmetal
• (c) uranium
• U- metal
• (d) mercury
• Hg- metal
• (e) arsenic
• As- metalloid
• (f) iridium
• Ir- metal

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• 2. List three differences in the physical
  properties between metals and nonmetals.
• Metals are shiny, malleable and good conductors
  whereas nonmetals are dull, brittle and dont
  conduct electricity (insulators).

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• 3. You are given a hammer, a battery, a bulb, and
  wires. How could you use these materials to
  determine if an unknown solid was a metal or a
  non-metal? Explain (you may also illustrate) how
  you will test the substance and what results you
  will look for.