sub metal revision task Flashcards
i have a subsitute and we are revising metal and their properties (22 cards)
what is a physical property
the properties that describe a substance on its own (colour, density and strength)
what is a chemical property?
how a substance reacts with other substances
what is examples of properties of metals?
high melting point, strong, flexible, malleble, shiny, good conductors
what is copper used for?
used in electrical circuits and water pipes.
what is aluminium used for?
used in window frames because its strong and light
what is the equation for metal and oxygen reacting
metal + oxygen -> metal oxide
what is the use of a catalyst?
they speed up chemical reactions
where is a catalytic converter found?
in cars to convert dangerous gases into harmless ones
what is corrosion
any reaction with oxygen at the surface of a metal
what is ratio
comparison of the proportion of two quantities
how can you prevent rust
use a barrier such as paint, plastic or oil to keep away air/water
what is the most reactive metal
potassium
what is the least reactive metal?
platinum/gold
can sodium catch fire when it reacts with oxygen in the air?
yes
what is the definition of recativity
how quickly/vigorously something reacts
what is the reactivity series?
a list of metals in the order of their reactivity
name 2 metals that react explosively
any two of the following: pottasium/sodium/lithium
what is effervescence?
the production of gas. Occurs when metals react with an acid.
what does ‘pure’ mean?
substance made up of one type of atom
what does ‘alloys’ mean
mixtures of metals
what is stainless steel made of
iron mixed with carbon, chromiun and nickel
