Clil Module Periodic Table Of The Elements Worksheet - Prof.ssa Elena Tibaldi - Istituto Sant''Anna - 2012-2013 Page 37
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48THE TRANSITION ELEMENTS
One group of transition elements is found between group II and III.
Transition elements have similar physical properties:
• have higher densities than group I and group II metals
• have higher melting points and boiling points than group I and group II metals because
they have strong inter-atomic forces
• are harder and stronger than group I and group II metals
• are good conductors of electricity and heat
Transition elements have similar chemical properties:
• are less reactive than group I and group II metals because it is more difficult to lose
electrons
• do not react with water but can form oxides when reacted with steam
• they can have more that one valancy. Example: iron can lose two electrons (
Fe
) or
2+
three electrons (
Fe
)
3+
• form coloured compounds and solutions
Some of transition elements are commonly used as follows:
• copper (Cu)
in alloys with tin (Sn) (
bronze) and with zinc (Zn) (
brass)
• iron (Fe)
highly reactive with oxygen (
rust); used in alloys with carbon (C) (
steel)
• lead (Pb)
metal elements whose compounds are toxic; used for containers that protect
against harmful radiation; poor electricity conductor; does not corrode easily
• titanium (Ti)
aircraft, hip joint replacement
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