Giant Covalent Structures
Gbogbo ọrọ náà
Diamond and graphite are both made of nothing but carbon atoms, yet one is the hardest natural substance known and the other is soft enough to write with. The reason is not the atoms but how they are bonded into giant structures. This is one of chemistry's most striking lessons.
In this lesson you will learn what a giant covalent structure is, and how the different arrangements of carbon atoms in diamond and graphite give them such contrasting properties. You will link each property directly to the structure and bonding.
Ebumnobi
- Describe the giant covalent structures of graphite and diamond.
- Relate the structures and bonding of graphite and diamond to their uses, limited to: (a) graphite as a lubricant and as an electrode (b) diamond in cutting tools.
- [Supplement] Describe the giant covalent structure of silicon(IV) oxide, SiO₂.
- [Supplement] Describe the similarity in properties between diamond and silicon(IV) oxide, related to their structures.
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Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
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Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Giant Covalent Structures. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which is a property of all giant covalent structures? A. Low melting point B. Very high melting point C. Made of small molecules D. Soft Answer: B
- How many covalent bonds does each carbon atom form in diamond? A. 1 B. 2 C. 3 D. 4 Answer: D
- Why does graphite conduct electricity? A. It contains ions B. It has delocalised electrons free to move C. It is a metal D. Its bonds are weak Answer: B
- Why is graphite soft and slippery? A. Its atoms are far apart B. Its layers can slide over one another C. It has only one bond per atom D. It melts easily Answer: B
- Which substance has a giant covalent structure? A. Carbon dioxide B. Water C. Diamond D. Oxygen Answer: C
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Structure and General Properties of the Metalloids
Describe the general preparation, properties, and uses of the metalloids
"Chemistry: Structure and General Properties of the Metalloids" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/18-3-structure-and-general-properties-of-the-metalloids. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Giant Covalent Structures? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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