AQA A Level Chemistry - Atomic Structure - Flashcards in A Level and IB Chemistry

1. Holds 2 electrons in 1 orbital (1, 8)
4. Have different numbers of electrons but the same number of protons (3)
6. The sample passes through an electric field of fixed strength (constant P.D.) which gives all the ions the same energy (12)
7. Holds 14 electrons in 7 orbitals (1, 8)
10. Suggested that all matter was made from indestructible atoms (4, 6)

2. Has the same atomic number but a different atomic mass (7)
3. Discovered neutrons in the nucleus to stop protons repelling each other (5, 8)
5. Created the "plum pudding" model where electrons are in a sphere of positive charge (1, 1, 8)
8. Discovered that electrons are arranged in shells that orbit the nucleus and they determine reactivity. Protons form the nucleus (5, 4)
9. Created the nuclear model where electrons orbit a positive nucleus. Done by gold foil experiment (7, 10)

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