Filtration
Used for separating insoluble solids from a solution:
Place a filter funnel with filter paper in a conical flask
Pour the solution into the funnel and the filtrate will go to the conical flask and the solids will stay in the funnel
Use for crystalssion and PRACTICAL
Used for separating a soluble solid from a solution:
Heat the solution in an evaporating basin, resulting in crystals and then cool. Next, use filtration to separate the crystals
State symbols
solid (s) liquid (l) gas (g) dissolved in water (aq)
Distillation
Heat the liquid to evaporate it then cool the vapour with a condenser to condense it back to the liquid
Alpha scattering experiment
Scientists fired alpha particles at gold foil, most pass straight through without direction change, some changed direction and some bounced back.
Proton, neutron, electron relative charge n mass
Proton: 1 1
Neutron: 0 1
Electron -1 very small
Atomic number shows the amount of ___
protons
Mass numbers shows the amount of ____ and ___ added together
protons and neutrons added together
RELATIVE ATOMIC MASS FORMULA
(mass of isotope 1 x isotope 1 abundance) + (mass of isotope 2 x isotope 2 abundance) / 100
What did Mendeleev do in his table and how did he order
left gaps and ordered by atomic weight
Noble gases are very ____ elements
unreactive
Why are they unreactive
they have a full outer shell
2 reaction with group1 and water
Fizzing and gas produced
Most reactive in group 7 and group 1
Fluorine and Francium