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Questions and Answers
What is the atomic number of carbon?
What is the atomic number of carbon?
6
What is the percentage of carbon in the earth’s crust?
What is the percentage of carbon in the earth’s crust?
- 5%
- 1%
- 0.02% (correct)
- 0.03%
Which of the following is a compound of carbon?
Which of the following is a compound of carbon?
- Water (H2O)
- Oxygen (O2)
- Sodium Chloride (NaCl)
- Carbon Dioxide (CO2) (correct)
What are the valence electrons in carbon?
What are the valence electrons in carbon?
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What happens to carbon compounds when burnt?
What happens to carbon compounds when burnt?
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Most carbon compounds are good conductors of electricity.
Most carbon compounds are good conductors of electricity.
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The forces of attraction between the molecules of carbon compounds are ______.
The forces of attraction between the molecules of carbon compounds are ______.
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Which of the following statements about carbon is correct?
Which of the following statements about carbon is correct?
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Study Notes
Carbon
- The atomic number of carbon is 6.
- Carbon makes up 0.03% of the Earth’s crust.
- Carbon compounds include carbon dioxide (CO2), methane (CH4), and glucose (C6H12O6).
- Carbon has 4 valence electrons.
- When carbon compounds are burnt, they release energy and produce carbon dioxide and water.
- Most carbon compounds are not good conductors of electricity.
- The forces of attraction between the molecules of carbon compounds are weak, leading to lower melting and boiling points.
- Carbon is a non-metal and exists in various allotropes, including diamond and graphite.
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