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Give three properties which are specific to transition metals
1) They can form more than one ion e.g cobalt form Co2+
2) They are often coloured, therefore compounds which contain
them are colourful e.g. potassium chromate is yellow
3) They often make good catalysts e.g. nickel based catalysts are
used in the hydrogenation of alkenes
State three trends as you go down Group 1
1) Increased reactivity - the outer electron is more easily lost as the
attraction between the nucleus and the electron decreases because the
electron is further away from the nucleus
2) Lower melting and boiling points
3) Higher relative atomic mass
What are the products of the reaction of a Group 1 metal and water
Hydrogen gas and a metal hydroxide
E.g. sodium + water --> sodium hydroxide + hydrogen
,What's the difference between the hardness of Group 1 and transition
metals?
Transition metals are harder, denser and stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition
metals?
Group 1 metals are much more reactive than transition metals
What's the difference between the melting points of Group 1 and
transition metals?
Transition metals have higher melting points than Group 1 metals
What trends occur as you go down Group 7?
1) They become less reactive - it's harder to gain an extra electron
because the outer shell's further from the nucleus
2) They have higher melting and boiling points
3) They have higher relative atomic masses
What is the charge of the ions that halogens form when they react with
metals?
They form negative ions
What is the trend in boiling point as you go down Group 0?
The boiling points increase
,What subatomic particles does the nucleus contain?
Protons and neutrons
What is relative atomic mass?
The mass number which refers to the element as a whole
How are positive ions formed?
A metal atom loses electrons
How are negative ions formed?
A non-metal gains electrons
What is air a mixture of?
Gases, mainly nitrogen, oxygen, carbon dioxide and argon
What is crude oil a mixture of?
Different length hydrocarbon molecules
How can you separate substances in a mixture?
Chromatography
, What is simple distillation used for?
Separating out a liquid from a solution
E.g. separating pure water from seawater
How were elements arranged in the early 1800s?
By their physical and chemical properties and their relative atomic mass
How are columns arranged?
Elements with similar properties
What are the three similar basic properties of metals?
1) They're strong but are malleable
2) They're great at conducting heat and electricity
3) They have high boiling and melting points
What is the product of the reaction of a Group 1 metal with chlorine?
A metal chloride salt
E.g. sodium + chlorine --> sodium chloride