3.5. Nonmetals and Their Properties

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Questions and Answers

Which of the following is a characteristic property of nonmetals?

  • They have high melting points.
  • They are good conductors of electricity.
  • They generally do not shine. (correct)
  • They are strong and unbreakable.

What is the primary use of sulfur?

  • As a light source.
  • To vulcanize tires. (correct)
  • In making fertilizer.
  • To sterilize medical equipment.

What state of matter are some nonmetals found in?

  • Solid, liquid, and gas. (correct)
  • Solid only.
  • Liquid only.
  • Gas only.

Why are nonmetals often used for producing electrical cable covers?

<p>They are excellent insulators. (C)</p> Signup and view all the answers

Which of the following nonmetals is commonly used to fill balloons?

<p>Helium (D)</p> Signup and view all the answers

Which of the following nonmetals is typically used in computer chip production?

<p>Silicon (C)</p> Signup and view all the answers

Which nonmetal is known for its use in disinfecting water?

<p>Chlorine (C)</p> Signup and view all the answers

Which of the following statements about nonmetals is incorrect?

<p>They have high tensile strength. (D)</p> Signup and view all the answers

Flashcards

What are Non-metals?

Non-metals are elements that lack the characteristic properties of metals such as conductivity, malleability, and ductility.

What is the physical state of solid nonmetals?

Solid nonmetals are often brittle, meaning they break easily. Think of a piece of chalk.

What is a key property of nonmetals?

Nonmetals do not conduct electricity well. This is why they're used to insulate electrical wires.

What is a common physical state of nonmetals?

Many nonmetals are found in gaseous state at room temperature. Think of oxygen and nitrogen in the air.

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What is sulfur used for?

Sulfur is used in the vulcanization process to strengthen rubber, making tires more durable.

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What is oxygen used for?

Oxygen is essential for breathing and is used in hospitals to help patients with respiratory problems.

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Why is Helium used for balloons?

Helium is a lightweight gas that makes balloons float. Think about party balloons.

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What is Chlorine used for?

Chlorine is used as a disinfectant in water treatment to kill harmful bacteria.

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Study Notes

Nonmetals

  • Nonmetals are found in nature and have various uses.
  • Nonmetals have three physical states: solid, liquid, and gas.
  • Solid nonmetals are often not smooth and may be crumbly.
  • They don't shine (reflect light).
  • Most don't conduct electricity (important for insulation).
  • Many don't conduct heat.
  • They are not strong and don't make a sound like metals.
  • They have low melting and boiling points.

Uses of Nonmetals

  • Sulfur is used to vulcanize tires.
  • Oxygen is used to help people breathe in hospitals.
  • Helium is used to fill balloons.
  • Chlorine solution is used to kill bacteria.
  • Carbon is used to purify water.
  • Silicon is used to make computer chips.

Properties of Nonmetals

  • Nonmetals are often in solid form but some are also gaseous.
  • Solid nonmetals are usually brittle.
  • They are not as strong as metals.
  • They do not conduct electricity or heat well.

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