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C4 flash cards
Karten in diesem Stapel (2)
- 11. What are the masses and charges of electrons, protons and neutrons? 2. Why is an atom netural? 3. What are isotopes 4. Explain something key in the development of the theory of atomic structure 5. What were their explanations and how were theories developed further 6. Who discoved and electron and who discovered and electron 7. What happened with the plum pudding model?1. Electron charge -1 mass 1/2000
proton charge 1 mass 1
Neutron charge 0 mass 1
2. contains an equal number of protons and electrons
3. Isotopes are a variety of an element that have the same number of protons and electrons but a different number of neutrons
4. Unexpected results(e.ge geiger and Marsden's experiment) led to the Rutherford's theory of a nuclear atom
5. provisional . When more evidence was available their theory or model could be developed further
6. 1803 - Daltons model of an atom
1897, JJ Thomson discovered the electron
7. 1911, Ernest Rutherford said the atom had a nucleus surrounded by a ring of electron. He proved Niels Bohrs plum pudding model wrong - 21. What is an ion? 2.1. charged atom(loses or gains electrons)
2.
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- GCSE Science (C4 B4 P4) Karteikarten am C4 flash cards, erstellt von Isa Idris am 10/11/2015.
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