The Elements
7-4
The Elements
Description: Many samples of elements are available to be displayed in class.
Concept: An element is a substance that cannot be decomposed by any chemical reaction into simpler substances; a type of matter composed of only one kind of atom, each atom of a given kind having the same properties.
Materials:
List of elements that are available:
• Li, Na, K, Rb, Cs (see also Alkali Metals for further instructions)
• Mg, Ca (see also Alkaline Earth Metals for further instructions)
• Ti
• Ta
• Mo, W
• Co
• Ni, Pt
• Cu, Ag, Au (The Noble Metals)
• Zn, Hg
• Al
• C (graphite and diamond powder), Si, Ge, Pb (The Carbon Family - C, Si, Ge)
• P, Sb, Bi
• S, Se
• Cl2, Br2, I2 (see Halogens for further instructions)
• He, Ne, Ar (see Rare Gases for further instructions)
• U (shavings)
Procedure:
Display and/or pass samples around to the class.
Notes:
The collection of elements was started by Prof. Ewing.
Other related demos:
Periodic Table Construction
Rare Gases
Halogens
Alkali Metal Properties
Alkaline Earth Metals
Emission Spectrometry or Flame Tests
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