topic 4 Flashcards
in the other chemistry folder
do atom sizes increase or decrease down the periodic table?
increase
do atom sizes increase or decrease across the periodic table?
decrease
what are 3 factors that impact ionisation energies?
- nuclear radius (smaller=stronger)
- nuclear attraction
- # of shielding(Same as electro negativity)
does reactivity increase or decrease down group 2?
increase
does boiling point increase or decrease down group 2?
decrease
does boiling point increase or decrease down group 7?
increase
does reactivity increase or decrease down group 7?
decrease
G2 Metal + O2 ->
2MO (s)
G2 metal oxide + H2O ->
M(OH)2 (aq)
G2 Metal + Cl2 ->
MCl2 (s)
G2 Metal + 2H2O (l) ->
M(OH)2 + H2
Does solubility of G2 metal hydroxides increase or decrease down the group? Why?
increase,
because ionic radius increases so it is easier to break
1- ions
HydroxIIIIdes
Mg + H2O(g/steam) ->
MgO (s) + H2 (g)
Does G2 metal sulphate solubility increase or decrease down the group?
decrease down
Bcs 2- ions
SSSSulphate - leSSSS
Ba(NO3)2 (aq) + Na2SO4 (aq) ->
Barium nitrate + Sodium sulfate ->
BaSO4 (s) + 2 NaNO3 (aq)
Barium sulfate + Sodium nitrate
Ca(OH)2 (aq) + CO2 (g) ->
CaCO3 (s) + H2O (l)
what are G2 metal oxides and hydroxides used for?
Neutralisation reactions and agriculture
what is formed when brown fumes are observed?
NO2
Nitrogen dioxide
what is the definition of thermal stability?
How much a compound decomposes under heat
What are 3 factors that affect thermal stability?
- ionic radius
- outermost shell e- quantum shell
- charge density/of cation - 2+ stronger than 1+)
Is a smaller ion more or less thermally stable? And why?
smaller = higher charge density/more polarising = less thermal stability