Giant Covalent Structures
Muhtasari
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.
Malengo
- 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.
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Giant Covalent Structures. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Giant Covalent Structures? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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