Flashcards
The Nuclear Atom
Flashcards do conjunto (14)
- 1Name three parts of the atomNeutrons, protons and electrons
- 2describe electronssmallest part of the atom
negatively charged - 3describe protonsmass 2000x that of an electron
positively charged - 4neutronssame mass as a proton
negatively charged - 5describe the overall atomneutral = equal number of electrons and protons
- 6what year was the Rutherford-Geiger-Marsden experiment performed in?1909
- 7describe the Rutherford-Geiger-Marsden experimentalpha particles from a radioactive source are fired at gold foil.
provided evidence about the structure of the atom - 8what were the observations?most alpha particles passed straight through undeivated
a few were deflected through small angles
even fewer bounced straight back form the foil - 9what were the conclusions?the atom is mostly empty space
the mass and charge of the atom is concertrated in a small are in the centre of the atom (the nucleus)
the nucleus was positive - 10where is most of the mass of an atom is concentrated where?the nucleus
- 11a strong nucleur force in the atomholds the protons and neutrons together
- 12the strong nucleur force has to balance therepulsive electrostatic force between the protons
- 13the number of protons in a nucleus determinesthe element and its chemical properties
- 14what is isotopes?atoms of the same element with the same number of protons but differing numbers of neutrons in the nucleus
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- GCSE Science FlashCards sobre The Nuclear Atom, criado por missalicelinsell em 05-06-2013.
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