Flashcards for topic C1 for GCSE combined science: trilogy
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Creado por Annie Loizides
hace alrededor de 7 años
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Cerrar
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Creado por Annie Loizides
hace alrededor de 7 años
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What are all substances made from?
What do elements contain?
What does the periodic table list?
What do the symbols in the periodic table represent?
What do compounds contain?
What are all atoms made of?
What do chemical equations show?
What is useful about symbol equations?
What is a balanced equation?
The law of conservation of mass
When can the law of conservation of mass altered?
What is an aqueous solution?
What is a mixture composed of?
Can mixtures be separated ?
Compounds
Mixtures
Physical means to achieve separation:
Filtration
Crystallisation
Distillation
Why is fractional distillation effective?
Why does Fractional distillation differ from distillation?
DEscribe how fractional distillation works?
What is chromatography?
Describe how chromatography works?
What was the earliest idea about the history of the atom?
What did Dalton suggest?
What did Dalton suggest about chemical reactions?
What did J.J. Thomson discover in the late 1800s?
What were JJ THomson's suggestions?
How did JJ Thompson's discovery contradict Dalton?
Who gave evidence for the nucleus?
What did the Geiger and Marsden students carry out?
What did Rutherford conclude from the results of Geiger and Marsden?
What did Neils Bohr state in 1914?
How were neutrons suggested?
Why were neutrons difficult to discover?
What does the nucleus contain?
What is a third types of sub-atomic particle which orbits the nucleus?
What charge do protons have?
What charge do neutrons have?
What charge do electrons have?
Where is the mass of an atom concentrated?
W
What is the mass of an electron like?
Why is there no overall charge on any atom?
What is the atomic number ?
Why does it help knowing the atomic number of an element?
What is the mass number?
How can you work out the number of neutrons
what is an ion?
What happens if an atom loses electrons?
What happens if an atom gains electrons?
What are isotopes?
What does an isotope have?
What can extra neutrons cause?
What may be different about samples of different isotopes?
What is always the same about isotopes?
How are electrons arranged?
How do the electrons fill up the atom?
Give the e.c for the maximum number of shells/
How many electrons do all group 1 elements contain in their outermost shell?
How do you work out the electronic configuration?
What do the chemical properties depend on?
Describe group 0 elements in the periodic table.
What happens after 8 electrons occupy the eighth shell?
