Paper 2

• Hydrocarbons are molecules made up of hydrogen and carbon only.
• The general formula for alkanes is CnH2n+2.
• Activation energy is the minimum energy needed for a reaction to take place.
• A reactant is a substance we start with before a chemical reaction takes place.
• Their names always end in ________ and are named according to how many ______________ atoms there are in the molecule.
• Covalent hydrogen -ane hydrocarbons carbon carbon alkanes
• All molecules are composed of __________________ atoms bonded to ______________ atoms by _________________ bonds.
• All alkanes have the same general formula of CnH2n+2.
• The molecular formula of butane is: C4H10.
• Hexane is an alkane.
• If there are n C atoms, how many H atoms?
• I can apply general formula to generate a molecular formula and a displayed formula for an alkane.
• The examination requires you to circle the exam verb, underline the key pieces of information in the question, identify the atoms that make up the structure, and describe the type of bonding involved in the structure.
• Butane is an alkane.
• Displayed formula shows how the relative positions of the atoms and all of the bonds between them.
• Molecular formula shows the number of each type of atom in the molecule.
• Write down everything that this diagram tells you about a methane molecule.
• The molecular formula of hexane is: C6H14.
• The fractions in crude oil contain a mixture of hydrocarbons, including a family called alkanes.
• The number of hydrogen atoms in an alkane is twice the number of carbon atoms plus two.