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Zorluk: OrtaCarbon: Allotropes, Coal Distillation, and Industrial Fuel Gases

Both diamond and graphite consist entirely of elemental carbon in the solid state, yet they exhibit markedly different physical properties such as hardness and electrical conductivity. Which of the following statements accurately explains why they are classified as allotropes?

  1. They represent different structural forms of the same element existing in the same physical state.Cevap
  2. B
    They consist of atoms of the same element with identical atomic numbers but different mass numbers.
  3. C
    They are compounds possessing the exact same molecular formula but different structural arrangements of atoms.
  4. D
    They are different physical states of carbon formed at different environmental temperatures.

Cevap

Diamond and graphite are classified as allotropes because they represent different structural forms of the same element in the same physical state.
The correct option accurately states that allotropes are different structural arrangements of the same element within the same physical state. In diamond, each carbon atom is tetrahedrally bonded (sp3sp^3 hybridized), whereas in graphite, carbon atoms form planar hexagonal layers (sp2sp^2 hybridized).

Adım Adım Çözüm

1
Define allotropy in the context of main-group non-metals like carbon.
Allotropy is identified as the phenomenon where a single element exists in multiple structural forms within the same physical state (e.g., solid graphite, diamond, and fullerenes).
Understanding the precise chemical definition distinguishes allotropy from related chemical concepts.
2
Compare allotropy with alternative concepts such as isotopy, isomerism, and phase changes.
Isotopes differ by mass/neutrons, isomers are distinct compound structures with equal formulas, and physical states refer to solid/liquid/gas phases.
Eliminating definitions of isotopes, isomers, and state changes ensures accurate concept identification.

Anahtar Kavram

Allotropy of Carbon
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Carbon: Allotropes, Coal Distillation, and Industrial Fuel Gases

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