chemical change Flashcards
chemical change
a chemical change is a chemical reaction involving the rearrangement of atoms etc burning wood
physical change
A physical change is a type of change in which the form of matter is altered etc. crushed can
physical properties
properties that you can either observe using your five senses — seeing, hearing, touching, smelling and tasting — or measure directly
chemical properties
properties that describe how a substance combines with other substances to form new chemicals or how a substance breaks up into two or more different substances
flammability
an indicator of how easily a substance catches fire
reactivity
a measure of how likely a particular metal is to take part in a displacement reaction
toxicity
the danger to your health caused when poisonous substances combine with chemicals in your body to produce new substances and damaging effects
evaporates
change state from a liquid to a gas. Evaporation occurs only from the surface of a liquid.
state
condition or phase of a substance. The three main states of matter are solid, liquid and gas
reactants
chemical substance used up in a chemical reaction. Some chemical bonds in a reactant are broken during the reaction.
products
new chemical substance that results from a chemical reaction
precipitate
solid product of a chemical reaction that does not dissolve in water
reaction rate
speed at which a reaction takes place
catalyst
chemical that helps to start or speed up a chemical reaction
