Topic 2: Periodic Table
Transition Metals (G3 - G12)
Malleable
High electrical conductivity
High melting & boling point
Topic 2: Periodic Table
Alkali metals (G1)
with oxygen to form oxides e.g. Li2O
with water to form hydroxides and hydrogen e.g. KOH
with halogens to form halides e.g. NaOH
Shiny when freshly cut
Easy to cut
Noble gases (G18)
Colourless
Monoatomic
Inert (Non- reactive)
Halogens (G17)
Poor conductors of electricity
Exist as diatomic molecules
Form halide when react with less electronegative elements
HX (aq) + H2O (l) → X- (aq) + H3O+ (aq)
Strong smell
Reacitivity decreases down the group
Alkaline earth metals (G2)
Reaction
Mg(s) + H2O(g) → MgO(s) + H2(g)
2Mg(s) + O2(g) → 2MgO(s)
MCO3(s) → MO(s) + CO2(g)
Soft, silver metals
Metalloids (G13)
Ductile & malleable
Semi-conductive
Solid at room temperature
General Trends
Ionization energy
Electronegativity
Ionic radii
Atomic radii
