atomic structure and the periodic table Flashcards
what is paper chromatography?
used to separate mixtures of soluble substances
what are the properties of a typical metal? (solid)
•good conductor of heat
•good conductor of electricity
•malleable
•ductile
•shiny
what are the typical properties of a non-metal? (solid)
•poor conductor of heat
•poor conductor of electricity
•brittle
•dull
•low density
when does a solution form?
when a solute dissolves in a solvent
what will happen to the pH of an alkali if it is more concentrated?
it will be higher
what happens to the pH if the acid is more concentrated?
it will be lower
what do acids produce in water?
H+ ions
what is the timeline for the atomic structure?
(hint 4)
•john dalton- solid sphere
•j.j thompson- plum pudding
•ernest rutherford-nuclear model
•neils bohr- planetary model
•james chadwick-discovery of the neutron
what do alkalis produce in water?
OH- ions
what is fractional distillation?
used to separate different liquids from a mixture of liquids
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I2- iodine
Br2- bromine
Cl2- chlorine
F2- fluorine
O2- oxygen
N2- nitrogen
H2- hydrogen
what is distillation?
used to separate a solvent from a solution
what is crystallisation?
used to produce solid crystals from a solution
what is filtration?
used to separate an insoluble solid from a liquid
what is a mixture?
two or more substances NOT chemically combined
