男人资源站-涩涩五月天-加勒比一区二区-欧美丰满少妇-清纯唯美亚洲-蜜臀久久99精品久久久久宅男-1024手机在线观看-a免费在线观看-日韩一区二区三免费高清在线观看-激情欧美一区二区-日韩综合网站-色小说av-夜夜夜操操操-色片在线播放-免费在线观看中文字幕

  • 翰林提供學(xué)術(shù)活動(dòng)、國(guó)際課程、科研項(xiàng)目一站式留學(xué)背景提升服務(wù)！

Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.2 Covalent Bonds: Dot & Cross Diagrams

Category: IGCSE課程, 國(guó)際課程, 教材筆記, 福利干貨 Date: 2022年7月13日 上午11:50

Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.2 Covalent Bonds: Dot & Cross Diagrams

Covalent Bonds: Dot & Cross Diagrams

 

  • Covalent substances tend to have small molecular structures, such as Cl2, H2O or CO2
  • These small molecules are known as?simple molecules
  • Small covalent molecules can be represented by dot and cross diagrams
  • You need to be able to describe and draw the structures of the following molecules using dot-and-cross diagrams: hydrogen (H2), chlorine (Cl2), oxygen (O2), nitrogen (N2), hydrogen chloride (HCl), water (H2O), ammonia (NH3) and methane (CH4)
  • The correct dot and cross diagrams for these molecules are shown below:

 

 

Diatomic Molecules

 

Dot-cross-Hydrogen_

 

Dot & cross representation of a molecule of hydrogen

 

 

Dot-cross-Chlorine_

 

Dot & cross representation of a molecule of chlorine

 

 

 

Dot-Cross-Oxygen

 

Dot & cross representation of a molecule of oxygen

 

 

 

Dot-cross-Nitrogen_

 

Dot & cross representation of a molecule of nitrogen

 

 

 

Dot-cross-Hydrochloric-Acid_

 

Dot & cross representation of a molecule of hydrogen chloride

 

 

 

Inorganic Molecules

 

Dot-cross-Water_

 

Dot & cross representation of a molecule of water

 

 

Dot-cross-Ammonia_

 

Dot & cross representation of a molecule of ammonia

 

 

Dot-cross-Carbon-Dioxide_

 

Dot & cross representation of a molecule of carbon dioxide

 

 

 

Organic Molecules

 

Dot-cross-Methane_

 

Dot & cross representation of a molecule of methane

 

 

1.7.2-Ethane-Dot-Cross-Diagram

 

Dot & cross representation of a molecule of ethane

 

 

Dot-cross-Ethene_

 

Dot & cross representation of a molecule of ethene

 

 

Exam Tip

Simple covalent molecules are small and can be separated into individual molecular units without breaking any chemical bonds (although there will still be strong covalent bonds holding the atoms in each individual molecule together) Giant ionic and covalent structures form huge continuous networks of atoms that are bonded together and cannot be separated into individual units without breaking bonds.

轉(zhuǎn)載自savemyexam

以上就是關(guān)于【Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.2 Covalent Bonds: Dot & Cross Diagrams】的解答，如需了解學(xué)校/賽事/課程動(dòng)態(tài)，可至翰林教育官網(wǎng)獲取更多信息。

往期文章閱讀推薦：

MIT官方發(fā)布【2026年夏季推薦閱讀書(shū)單】！橫跨科學(xué)/人文/經(jīng)濟(jì)...

深耕九載！30+國(guó)際競(jìng)賽/課程講義，碩博100%團(tuán)隊(duì)操刀，助力爬藤?zèng)_G5！

? 2026. All Rights Reserved. 滬ICP備2023009024號(hào)-1

國(guó)際競(jìng)賽 國(guó)際競(jìng)賽
了解背提項(xiàng)目
國(guó)際課程 國(guó)際課程
國(guó)際課程
商務(wù)合作 商務(wù)合作
商務(wù)合作
課程試聽(tīng) 課程試聽(tīng)