Flashcards

Atoms

Cristina Blanco Spanish 7 cards

Cards in this deck (7)

1What is an atom?Is the smallest particle made of a nucleus and an electrons shell.
2Electrons, protons and neutronsNeutrons: a subatomic particle of about the same mass as a proton but without an electric charge
Protons: is a subatomic particle with a positive electrical charge.
Electrons: The electron is a subatomic particle that is found in all atoms.
3Jhon Dalton1893, compact and firm sphere.
4Joseph Thompson1897, atom as a proton sphere with a positive charge, electrons embedded on it
5Ernest Rutherford1911, electrons move in permanent orbits (shells)
6Niels Bohr1913, nucleus, positive charge, electrons orbit the nucleus.
7Werner Heisenberg1927, the mass is concentrated in the nucleus, electrons form a shell in levels and sublevels