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Chemistry
Definitions
| Term | Definition |
|---|---|
| Acid (Arrhenius) | Dissociates in water to produce H+ ions |
| Acid (Bronsted-Lowry) | Proton donor |
| Acidic Oxide | Lowers pH in water |
| Activation Energy | Minimum energy required for effective collisions to occur |
| Addition Polymerisation | Monomers combine to form large molecules |
| Adsorption | Attaching gaseous or liquid molecules to a solid surface |
| Atomic Number | No. of protons in an atom |
| Atomic orbital | Region in space where an electron is most likely to be found |
| Atomic Radius | Half the ntermolecular distance between the nuclei of two atoms of the same element joined together by a single covalent bond |
| Atomic sub-level | Sub division of an energy level consisting of one or more orbitals of the same energy |
| Auto-ignition | Premature ignition |
| Avogadro's Law | Equal volumes of gas have equal numbers of molecules when under equal temperature and pressure conditions |
| Base (Bronsted-Lowry) | Proton Acceptor |
| BOD | Biochemical Oxygen Demand Amount of O2 consumed in ppm when sample kept in the dark for 5 days at 20 degrees celcius |
| Bond Energy | Energy required to break a bond in its gaseous state |
| Boyles' Law | At a constant temperature, the pressure is inversely proportional the the volume |
| Catalyst | Alters the rate of a reaction but is not used up |
| Catalytic Cracking | Splitting of a long chain molecule |
| Catalytic Poison | Substance that blocks active site of catalyst and stops it from working |
| Charles' Law | At a constant pressure, the temperature is directly proportional to the volume |
| Chemical Equilibrium | Forward reaction = reverse reaction |
| Chromatography | Separation of a mixture of components based on their attraction for a stationary phase while carried by a mobile phase |
| Condensation Reaction | Production of a more complex molecule with formation of an unsaturated compound by the loss of a small molecule |
| Conjugate Acid (Bronsted-Lowry) | Produced by gain of one proton |
| Conjugate Pair | Acid and base differing by a proton |
| Covalent Bond | The sharing of one or more pairs of electrons |
| Crystal | Regular solids made up of particles with faces intersecting at fixed angles |
| Dobereiner's Triads | Elements of similar properties in groups of three |
| Dynamic | |
| Effective Collision | |
| Electrolysis | |
| Electronegativity | |
| Element | |
| Energy Level | |
| Excited State | |
| First Ionisation Energy |
Created by:
Jammy Dodger
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