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Summary: Complete Chemistry For Cambridge Igcse® With Cd-Rom (Second Edition) | 9780199138784 | Ingram, et al
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Read the summary and the most important questions on Complete Chemistry for Cambridge IGCSE® with CD-ROM (Second Edition) | 9780199138784 | Ingram,; Gallagher,
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4 toetsweek
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what are atoms mostly consistyed of
empty space a nucleas and electronics -
what is special about an element
an element only contains 1 kine of atom -
what is special about a neutron
it has a mass of 1 unit and doesnt have a charge -
what is special about an electron
it has almost no mass and it has a negative charge -
what is special about protons and electrons together
they both always are of the similair amount -
how do you arrange the electrons in an atom
the first 3 circles -
ow can you know how much valency electrons there are
by looking at the group number -
what is the zig zag line in the periodic table for
the 2 groups the metals(left) and the non metals(right) -
what are the differences 8 between metals and non metals
metals: conduct heat and electricity
High boiling/melting points
hard do not shatter if you hammer them (non metals are brittle)
can be hammered into different shapes(malleable) and hammered into wirees(ductile)
look shiny when polished
make a ringing noise when struck (sonarous)
have a high density which makes the feel heavy
reacts with oxegyn to form bases (Non metals form acidic oxides) -
what does a mixture contain
more then 1 substance
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