Chemistry 2 Flashcards
Define Lustre
How shiny the substance is after sanding it with glass paper or steel wool
Define Ductility
Whether or not a substance can be drawn into a wire
Define Malleability
Whether or not a substance has the ability to be hammered or bent into shape
Define Chemical Change
When the substance/s changes into a new substance.
Define Physical Change
When the appearance of the substance changes but the chemical composition doesn’t
Define Reactivity
Whether a substance will react or not.
Define Corrodibility
Whether or not a substance breaks down due to a chemical reaction with water or oxygen.
Define Flammability
Whether a substance has the ability to be burned or not.
Define Toxicity
Whether a substance is poisonous or not.
Define Light Sensitivity
Whether a substance reacts in light or not.
Define Exothermic
Describes chemical reactions that give out heat energy to the surroundings
Define Endothermic
Describes chemical reactions that absorb heat energy from the surroundings
Define Chemical Energy
Energy stored in chemical bonds that is released during chemical reactions
Define chemical process
a reaction that changes the arrangement of the atoms or molecules of the substances involved
Define Synthesis Reaction
Occurs when two chemicals combine to form one larger chemical.
Define Decomposition Reaction
Occurs when one chemical breaks up to form two or more smaller chemicals.
Define Combustion Reaction
A chemical reaction in that a substance reacts with oxygen and heat is released
Define Single Displacement Reaction
Occurs when the atoms of a pure element replace those of an element in a chemical compound.
Define Precipitation/Double Replacement Reaction
The cations of two ionic compounds switch places, usually forming a precipitate.
Define Acid-base Reactions
When we add a base and acid together they react, neutralising each other and forming salt and water.
