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Chp 2 definitions
Chemistry Leaving cert Chapter 2 definitions only
| Question | Answer |
|---|---|
| Dalton's atomic Theory | Summarised. 1. All matter is made up of very small particles called atoms 2. All atoms are indivisible They cannot be broken down into simpler particles. |
| Cathode Rays | Streams of negatively charged particles called electrons. They travel in straight lines from the cathode to anode, are deflected by electric and magnetic fields, and have sufficient energy to move a small object such as paddle wheel. |
| Who came up with the concept of the atom? | One of the most important Greek philosophers, Democritus believed that the tiny particles could not be broken down, were indivisible, hence 'atomos' the Greek word for indivisible was used as their name |