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Search Results for silicon - All Grades

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College Periodic Table and Elements
Which of the following is present in quartz?
  1. silicon atoms
  2. silicon dioxide
  3. silicon doped with boron
  4. silicon tetroxide
College Periodic Table and Elements
Which of the following is present in ceramics?
  1. silicon atoms, only
  2. silicates
  3. silicon doped with arsenic
  4. silicon doped with boron
Grade 12 Periodic Table and Elements
Grade 12 Molecules and Compounds
Which of the following chemical formulae represent Feldspar, the most important mineral of silicon?
  1. [math]K_2O•Al_2O_3•6H_2O[/math]
  2. [math]K_2O•3Al_2O_3•5 SiO_2[/math]
  3. [math]K_2O_3•2Al_2O_3•4SiO_2[/math]
  4. [math]K_2O•2Al_2O_3•3SiO_2[/math]
College Periodic Table and Elements
Which of the following linkages are present in silicone?
  1. Si-O-Si linkage
  2. Si-O-P linkage
  3. Si-Cl-Si linkage
  4. Si-F-Si linkage
Grade 7 Earth's Layers
Earth's inner core is made of which two elements?
  1. oxygen and silicon
  2. iron and nickel
  3. iron and silicon
  4. copper and nickel
Grade 9 US Geography
Silicon Valley is located in this region
  1. West
  2. South
  3. Midwest
  4. Norheast
Grade 9 Atomic Structure

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Grade 12 Properties of Matter
College Molecules and Compounds
Given that R represents the alkyl group, which of the following represents the general formula of silicons?
  1. [math]SiR_2O[/math]
  2. [math]SiO_2R[/math]
  3. [math]SiOR[/math]
  4. [math]Si_2OR[/math]
Grade 12 Periodic Table and Elements
Which of the following elements are used as dopants in the semiconducting industry?
  1. Boron and Phosphorus
  2. Sodium and Magnesium
  3. Chlorine and Bromine
  4. Helium and Xenon
Grade 9 Earth's Layers
Grade 6 Earth's Layers
Grade 7 Periodic Table and Elements
Ag is the chemical symbol for which element?
  1. Sodium
  2. Silver
  3. Silicon
  4. Argon
Grade 10 Periodic Table and Elements
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