Flashcards in Unit 3 Metals Deck (20):
How do metal elements form metallic bonds?
force of attraction between delocalised electrons and positive ions
A metal's reactivity is ??
how easily it will give away electrons
Which elements react with water?
Up to sodium in the reactivity series (1st 4)
Which elements react with acid?
Up to lead in the reactivity series (1st block)
Which elements react with o2?
Up to silver in the reactivity series
Metal + o2 = ??
Metal + H2O = ??
Metal hydroxide + hydrogen
Metal + acid
Salt + hydrogen
A battery is made up of ??
many electrochemical cells
what is meant by a displacement reaction?
when a metal ion is displaced by a solution that is higher in the reactivity series
why is an ion bridge important when making an electrochemical cell
allows ions to move + completes circuit
what is the relationship between a metal's reactivity and whether it will undergo oxidation or reduction
electrons flow from the most reactive to the least reactive so if it is more reactive it is oxidised, if it is less reactive it is reduced
electrons flow from the ______ to the _______ metal
Most reactive, least reactive
chemical test for hydrogen
burns with a "pop"
what is the relationship between a metal's reactivity and ease of extraction from its ore?
the more reactive the metal, the harder it is to extract
which metals are found in the Earth's crust uncombined?
(least reactive) Copper, Silver, Mercury, Gold
which metals can be extracted by heat alone?
Mercury, silver + gold
which metals can be extracted by reaction with carbon?
zinc - copper (not hydrogen!)
which metals can be extracted only by electrolysis?
up to aluminium (1st 6)