Flashcards
Atoms
Cards in this deck (7)
- 1AtomsAn atom is the smallest particle in an object.
- 2Electron, proton and neutron.Electron: it has a negative charge and is the outer shell.
Proton: it has a positive charge and is in the nucleus.
Neutron: it has a neutral charge. - 3John DaltonIn 1893, he started that the atom was a compact sphere.
- 4Joseph ThompsonIn 1897, he started that the atom was a proton sphere with positive charge, embedded electrons.
- 5Ernest RutherfordIn 1911, he said that the electrons move by orbits.
- 6Niels BohrIn 1913, he said that the nucleus had positive energy and electrons orbit around.
- 7Werner HeisenbergIn 1927, he said that the mass is in the nucleus, electrons form shell.
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- Flashcards on Atoms, created by Ariana Sophia Martínez Contreras on 22/04/2025.
- Created by
- Ariana Sophia Martínez Contreras
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