chapt 3 : exploring diversity of matter by its chemical composition Flashcards
definition of element
consist of 1 type of atom, cannot be broken down into simpler substances by chemical methods
definition of compound
a substance made up of two or more element chemically combined together
how is a compound formed
chemical reaction occurred
does a compound has the same properties as its constituent elements
no
does the compound have a fixed composition by mass
yes
can compounds be separated using physical methods
no, it can be separated using chemical methods
definition of mixture
consist of two or more substances (element/compound) which are not chemically combined
does chemical reaction occur when mixture is formed
no
are the constituent of elements in mixtures in fixed composition by mass
no
does mixtures has the same properties has its constituent elements
yes
is air a mixture
yes
what are impure substances
mixture
what are pure substances
elements, compounds
how are elements classified
metals, non-metals
how are mixtures classified as
solutions and suspensions
factors affecting solubility
temperature, type of solute, type of solvent
factors affecting rate of dissolving
stirring, temperature, surface area of solute
what does dilute mean
the solvent has very little solute
what does concentrated mean
the solution has a large amount of solute
what does saturated mean
solution has maximum amount of solute, no more solute can dissolve
what does homogenous means
the solute completely dissolved in the solvent
whereas not homogenous means the solute did not dissolve in the solvent
