Simple Molecules And Covalent Bonds
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The oxygen you breathe, the water you drink and the methane that heats your food are all held together not by transferring electrons but by sharing them. This sharing creates the covalent bond, the glue of most non-metal compounds and the basis of all living matter.
In this lesson you will learn how a covalent bond forms when atoms share a pair of electrons, how to show this with simple diagrams, and how shared pairs build up familiar molecules such as hydrogen, water, methane and carbon dioxide.
Ebumnobi
- [Core] State that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations
- [Core] Describe the formation of covalent bonds in simple molecules, including H , Cl , 2 2 H O, CH , NH and HCl. Use dot-and- 2 4 3 cross diagrams to show the electronic configurations in these molecules
- [Core] Describe the properties of simple molecular compounds: (a) low melting points and boiling points (b) poor electrical conductivity
- [Supplement] Describe the formation of covalent bonds in simple molecules, including CH OH, C H , 3 2 4 O , CO and N . Use dot-and-cross diagrams 2 2 2 to show the electronic configurations in these molecules
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Ekele diri gi maka imecha ihe karịrị na Simple Molecules And Covalent Bonds. 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.
- A covalent bond is formed when atoms: A. Transfer electrons B. Share a pair of electrons C. Lose protons D. Gain neutrons Answer: B
- Covalent bonds usually form between: A. Two metals B. A metal and a non-metal C. Two non-metals D. Two ions Answer: C
- How many covalent bonds does carbon form in methane, CH4? A. 1 B. 2 C. 3 D. 4 Answer: D
- Simple molecular substances have low melting points because: A. The covalent bonds are weak B. The forces between molecules are weak C. They contain ions D. They have free electrons Answer: B
- Carbon dioxide, CO2, contains: A. Two single bonds B. Two double bonds C. One single bond D. Ionic bonds Answer: B
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Covalent Bonding
Describe the formation of covalent bonds
"Chemistry: Covalent Bonding" 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/7-2-covalent-bonding. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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