Topic 2: Periodic Table

Honelako gehiago

Computing for Humans

by Dénes Harmath

classification of materials

by ervin mok kai jiun

hydrogen

by racher dalagan

Chemistry Unit Activities

by Rebecca Bonham West

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