av Elise Low 15 år siden
244
Elements
The periodic table categorizes elements into metals and non-metals, each with distinct physical properties. Metals are generally shiny, malleable, and ductile, while non-metals tend to be dull and brittle.
Åpne
Elements Mixtures Rate of dissolving surface area of solute temperature of solution rate of stirring Rate of solubility nature of solute nature of solvents temperature Suspension a mixture in which 2 or more parts can be seen Solution a mixture that appears to be made up of one substance homogeneous appearance dilute, concentrated, saturated types: - solid-solid eg. alloys- solid-liquid eg. calamine lotion- liquid-liquid eg. vinegar- liquid-gas eg. soda drinks- gas-gas eg. air not mixed in fixed proportion can be seperated by physical methods has properties of tis constitutional substances no chemical reaction involved Seperations of mixtures paper chromatography fractional distillation distillation evaporation filtration magnetic attraction Compounds broken down by :-passing heat-passing electricity formed by combustion/decomposition fixed in proportion by mass different properties form its constitutional elements Periodic table Non-metals dull, brittle Metals shiny, malleable, ductile 7 periods, 9 groups
