Year 9 Science - Periodic Table PT1

the general properties of alkali metals

• Highly reactive metals

• React vigorously with water to produce hydrogen gas and heat

• Good conductors of electricity and heat

• Low ionization energies

• Form ionic compounds with nonmetals

the general properties of alkaline earth metals

• Reactive metals, but less so than alkali metals

• Good conductors of electricity and heat

• Higher ionization energies than alkali metals, but still relatively low

• Form ionic compounds with nonmetals

the general properties of transition metals

• Hard, strong metals with high melting points

• Good conductors of electricity and heat

• Form colored compounds

• Exhibit variable oxidation states

• Many are used as catalysts

general properties of halogens

• Highly reactive nonmetals

• Exist as diatomic molecules (X_2)

• Form ionic compounds with metals

• Form covalent compounds with other nonmetals