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Chemistry 2
Beschreibung
Chemistry Mindmap am Chemistry 2, erstellt von emjaza am 06/09/2013.
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chemistry
chemistry
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emjaza
, aktualisiert more than 1 year ago
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Erstellt von
emjaza
vor etwa 11 Jahre
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Zusammenfassung der Ressource
Chemistry 2
Monatomic elements
1 type of atom
1 atom separately
Group 18 naturally monatomic
Molecules / Diatomic
2+ atoms bonded together
Molecules of two atoms called diatomic molecules
Group 17 naturally diatomic
Most non-metals
Periodic Table
Represented by symbols
Vertical columns= groups / families
Horizontal Rows= Periods
Horizontally increases atomic number
Group 1
Alkali Metals
Form a base when reacts with H2O
Group 2
Earth Alkali Metals
Form a base when react with H20 but don't dissolve more
Group 17
Halogens
Salt forming
Group 18
Noble gases
Inert Gases
Don't take part in chemical reactions
Group A= Representative elements
Group B= Transition elements
Metals
Malleable
Ductile
Conduct heat & electricity
Lustre
Dense
High melting point
Rusts/corrodes with oxygen and H2O
Left side of table
2/3 of elements
Metalliods
shiny/dull
Malleable & Ductile
Near steps/ boundaries
Conductors- not as well as metals
Germanium, Silicon, boron, sand
Non-Metals
Dull
Don't conduct heat/electricity
Can be in any state of matter
Brittle, break easily
Low density
Low melting point
Don't form crystals
Right side of table
Atomic structure
Sub-atomic particles
Proton & Neutron in nucleus
electrons in valance shell/ electron cloud
Mass of atom= nucleus
Volume of atom= cloud/shell
Electron
e-
negative charge
orbit nucleus because attracted to protons
In uncharged, neutral atom, electrons=protons
Proton
p+
In nucleus
positive charge
mass of an atom
atomic number
Neutron
n0
In nucleus
Mass of atom
Identifying elements
Atomic #= # of protons identity if neutral
Mass #= # protons & neutrons mass of atom
Atomic number
Mass number
Heterogenous mixture
Not chemically combined
Easily separated physically
Retains original properties
Homogenous solution
1 substance dissolved in another
Best mixed
Solute in Solvent
Compound
more than 1 type of atom chemically combined
fixed, definite ration
same throughout
can be easily chemically broken down
Colloids
Mixed together, not dissolved
Permanently suspended
Will not separate upon standing
particles constantly colliding= murky/ cloudy
Alloys
Metals dissolved in metals
stainless steel= iron & chromium
brass= copper & zinc
Medienanhänge
cobalt (image/jpg)
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