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Definitions
Cards in this deck (8)
- 1Dalton's Atomic Theory1. All matter is made of very small particles called atoms.
2. All atoms are indivisible. They cannot be broken down into simpler particles. - 2Cathode raysare streams of negatively charged particles called electrons. They travel in straight lines from the cathode to the anode, are deflected by electronic and magnetic fields, and have sufficient energy to move small objects such as a paddle wheel.
- 3An energy level is defined asthe fixed energy value that an electron in an atom may have.
- 4The ground state of an atom isone in which the electrons occupy the lowest available energy levels.
- 5The excited state of an atom isone in which the electrons occupy higher energy levels than those available in the ground state
- 6Heisenberg's Uncertainty Principlestates that it is impossible to measure at the same time both the velocity and the position of an electron.
- 7An orbitalis a region in space within which there is a high probability of finding an electron
- 8A sublevelis a subdivision of a main energy level and consists of one or more orbitals of the same energy.
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- Fifth year Chemistry (The atom) Flashcards on Definitions, created by Gemma Reilly on 19/08/2019.
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- Gemma Reilly · Aug 2019
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- Aug 19, 2019
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