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Quiz Chapter 6: Periodic Table

10 questions ยท Form 1 Science Bab 6: Periodic Table

Question 1 of 10Score: 0

What property allows silicon to be classified as a metalloid?

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. What property allows silicon to be classified as a metalloid?

  1. It is a liquid at room temperature
  2. It exhibits properties intermediate between metals and non-metals
  3. It reacts violently with water to release hydrogen gas
  4. It cannot form chemical compounds
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Answer: B

Metalloids like silicon share characteristics of both metals and non-metals, often functioning as semiconductors.

2. How are elements ordered in the modern Periodic Table?

  1. Increasing atomic mass
  2. Increasing proton number
  3. Decreasing electron count
  4. Alphabetical order of chemical symbols
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Answer: B

Elements in the modern Periodic Table are arranged sequentially by increasing proton number (atomic number).

3. What is the smallest unit of an element that retains its chemical properties?

  1. Molecule
  2. Compound
  3. Atom
  4. Mixture
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Answer: C

An atom is the smallest particle of an element that can participate in chemical reactions.

4. What do horizontal rows in the Periodic Table represent?

  1. Groups
  2. Periods
  3. Families
  4. Bonds
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Answer: B

Horizontal rows are called periods (numbered 1 to 7), while vertical columns are called groups.

5. What technique would you use to separate insoluble sand particles from a mixture with water?

  1. Distillation
  2. Filtration
  3. Chromatography
  4. Evaporation
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Answer: B

Filtration separates insoluble solids (residue) from liquids (filtrate) using filter paper.

6. Which element is liquid at room temperature and classified as a metal?

  1. Bromine
  2. Mercury
  3. Sodium
  4. Chlorine
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Answer: B

Mercury is a metal that remains liquid at normal room temperature.

7. What charge is carried by an electron?

  1. Positive (+)
  2. Negative (-)
  3. Neutral (0)
  4. Variable
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Answer: B

Electrons carry a single negative relative electric charge (-1).

8. Which separation method is best suited to separate iron filings from sulfur powder?

  1. Filtration
  2. Evaporation
  3. Magnetic separation
  4. Chromatography
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Answer: C

Iron is a magnetic metal, so a magnet can easily attract iron filings while leaving non-magnetic sulfur powder behind.

9. Which of the following is an example of an element?

  1. Carbon dioxide
  2. Oxygen gas (O2)
  3. Glucose
  4. Sodium chloride
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Answer: B

Oxygen gas ($O_2$) consists solely of oxygen atoms, making it an element, whereas the others contain multiple types of elements.

10. Which element is a non-metal that uniquely conducts electricity in the form of graphite?

  1. Sulfur
  2. Carbon
  3. Phosphorus
  4. Oxygen
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Answer: B

Carbon in its allotropic form as graphite has delocalized electrons, allowing it to conduct electricity despite being a non-metal.

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