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Chemistry

GCSE · AQA

QuestionsFlashcards

Simple Model of the Atom
The Periodic Table
Properties of Transition Metals
- Typical Properties of Transition Metals
  7
- Transition Metals vs. Alkali Metals
  6

Ionic, Covalent & Metallic Bond
Bonding & Substance Properties
Structure & Bonding of Carbon
Bulk & Surface Properties
- Sizes of Particles & their Properties
  6
- Nanoparticles
  6

Formation of Earth's Atmosphere
CO2 & CH4 as Greenhouse Gases
Causes of Atmospheric Pollution
- Atmospheric Pollutants from Fuels
  6
- Properties & Effects of Atmospheric Pollutants
  6

Global Reserves & Potable Water
Life Cycle Analysis & Recycling
- Life Cycle Assessment
  7
- Reducing Use of Resources
  5
Using Materials
Haber Process & NPK Fertilisers

Alkenes Flashcards

All 6 cards in this deck

What is the general formula for the homologous series of alkenes?: $C_nH_{2n}$
What is the functional group of the alkenes?: The carbon–carbon double bond, $C=C$
Name the first four members of the homologous series of alkenes.: Ethene, propene, butene, pentene
Why are alkene molecules described as unsaturated?: They contain a $C=C$ double bond, so they have two fewer hydrogen atoms than the alkane with the same number of carbon atoms.
True or false? $C_3H_8$ is an alkene.: False. $C_3H_8$ is an alkane (propane); the alkene with 3 carbon atoms is propene, $C_3H_6$ .
In the displayed structural formula of ethene, what bonds are shown?: Two carbon atoms joined by a double bond ( $C=C$ ), with two hydrogen atoms single-bonded to each carbon.