What is C2H4? Important knowledge about C2H4

1. Definition of C₂H₄
   C₂H₄, also known as ethylene or ethene, is an unsaturated hydrocarbon, belongs to the alkene group. Ethylene has two carbon atoms and four hydrogen atoms.

1.1 Names
1.1.1 Common name: Ethylene, ethene
1.1.2 English name: Ethylene
1.2. Atomic mass: The molecular formula of ethylene is C₂H₄, so its atomic mass is 28.
1.3. Atomic weight: The atomic weight of C is 12, and that of H is 1. Hence, the atomic weight of ethylene is 212 + 41 = 28 Dalton.
1.3.1 Molecular structure: Ethylene molecules consist of two carbon atoms linked together by a double bond, and each carbon atom is further linked to two hydrogen atoms.
1.4 Ion structure: Ethylene cannot form ions in its natural state because it is a hydrocarbon that does not contain functional groups capable of forming ions.

2. Properties: C₂H₄
   2.1 Physical properties of C₂H₄
   State: At normal temperature and pressure, C₂H₄ is a gas
   Color: Colorless
   Odor: Odorless
   PH level: Undetermined as C₂H₄ is neither an acid nor a base
   2.2 Chemical properties of C₂H₄
   Ethylene can react with metals, acids, halogens, water to form various different products.
3. Synthesis of C₂H₄:
   4.1 Lab synthesis of C₂H₄: In the lab, we can synthesize ethylene by heating ethanol with sulfuric acid.
   4.2 Industrial synthesis of C₂H₄: In industry, ethylene is synthesized by the method of hydrocarbon cracking from petroleum or natural gas.