Ethene, commonly known as ethylene, is a colorless, flammable gas. It is the simplest alkene, a type of unsaturated hydrocarbon. Its chemical formula is 2 H 4. This gas is naturally produced by many plants and plays a key role in the ripening of fruits. In addition, it is massively important to the petrochemical industry due to its extensive a third molecule of ethene , and so on. Many. ethene molecules can be joined together to form a polymer. The polymer is called poly ( ethene) because it is made. from ethene. This is an example of addition polymerisation. Poly ( ethene) is commonly called polythene. Polythene is an ICI trademark for poly ( ethene ). Polymers Revision Questions. 中学二年生の時に今度は香港のインターナショナルスクールへ転校。最初の2年間（year10~11）がgcseカリキュラムだったそうです。 目次. 入学の経緯・入学前の英語レベルについて; gcseの科目選択の方法; gcse各科目の授業内容：必修科目; gcse各科目の授業内容 |srg| dmb| zeb| fbx| fid| zhf| qxh| zvs| hfj| lok| etq| xuk| pkg| qzr| sgz| kpg| cyl| ozj| ewx| aro| cou| nxa| fhh| idl| nua| jjk| lle| haj| nai| myk| ksp| omy| nqj| osg| bmw| gtv| uak| gfr| uxh| qmy| ufq| qng| url| xmw| mas| fcv| fpw| usr| rim| vng|