Flashcards
Transition Elements
Flashcards do conjunto (20)
- 1Where are the transition elements located on the periodic table and what are they called?In the centre of the periodic table, between groups 2 and 3, is a block of metallic elements called the transition metals.
- 2Give some examples of transition metals?Iron (Fe).
Copper (Cu).
Platinum (Pt).
Mercury (Hg).
Chromium (Cr).
Zinc (Zn). - 3What are transition metals most often?They are most often coloured.
- 4What colour are the copper compounds?Blue.
- 5What colour are the iron(II) compounds?Grey-green.
- 6What colour are the iron(III) compounds?Orange-brown.
- 7What are many transition metals and their compounds used as? Give some examples.Catalysts in chemical reactions:
Iron is used in Haber process.
Nickel is used in the manufacture of margarine. - 8What is thermal decomposition?It is a reaction in which a substance is broken down into simpler substances by heating.
- 9What happens to transition metal carbonates when they are heated?A colour change occurs an they decompose to from a metal oxide and carbon dioxide.
- 10Describe what happens to copper carbonate when it is heated.The blue-green copper carbonate decomposes into black copper oxide and carbon dioxide, which turns limewater milky.
- 11Write the word and symbol equation for the thermal decomposition of copper(II) carbonate.Copper(II) carbonate = Copper(II) oxide + Carbon dioxide.
CuCO3 = CuO + CO2 - 12Write the word and symbol equation for the thermal decomposition of manganese carbonate.Manganese carbonate = manganese oxide + carbon dioxide
MnCO3 = MnO + CO3 - 13What do metal compounds in solution contain?Metal ions.
- 14What do some of these metal ions form?Precipitates (insoluble solids) that come out of solution when sodium hydroxide solution is added to them.
- 15What precipitate does the ion copper(II) Cu2+ form?Blue.
- 16What precipitate does the ion iron(II), Fe2+ form?Grey-green.
- 17What precipitate does the ion iron(III), Fe3+ form?Orange-brown
- 18What is the ionic symbol equation for copper(II) Cu2+ in the precipitation reaction?Cu2+ + 2OH- = Cu(OH)2
- 19What is the ionic symbol equation for iron(II), Fe2+ in the precipitation reaction?Fe2+ + 2OH- = Fe(OH)2
- 20What is the ionic symbol equation for iron(III), Fe3+ in the precipitation reaction?Fe3+ + 3OH- = Fe(OH)3
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- GCSE chemistry (C4) FlashCards sobre Transition Elements, criado por Rebecca Smith em 11-04-2017.
- Criado por
- Rebecca Smith
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