Flashcards
Chemistry A Level OCR B (Elements of Life)
Cards in this deck (7)
- 1What was the model for Democritus' Atoms?Atoms are the smallest particles matter is built up from and are responsible for the properties of a material.
- 2What was the evidence for Democritus' Atoms?Democritus noticed that as you cut up a material, its properties remain the same.
- 3What was the model for Dalton's Billiard Balls?Matter is made from indivisible particles known as Atoms. Each atom has an element, and each element is unique.
- 4What was the evidence for Dalton's Billiard Balls?Observed that, when elements react to form compounds, they reacted in a constant ratio depending on the compound (Ie mass of Oxygen (1x16) in water is 8 times the mass of Hydrogen (2x1)
- 5What was the model for Thomson's Plum Pudding?◘ A spherical cloud of positive charge embedded with small negatively charged particles (e-).
◘ Total charge of atoms is neutral due to electrons and positive cloud cancelling out. - 6What was the evidence for Thomson's Plum Pudding?When a high voltage passes through a vacuumed tube, cathode rays travel from the to positive electrodes. Any positively charged surface attracts the cathode rays, showing a negative charge is present.
- 7What was the model for Rutherfords' Planetary Model?
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- Description
- This deck includes: - History of the Atomic Model - Subatomic particles - Isotopes - Calculating relative Atomic Mass using Mass Spectra - Nuclear Equations - Ion Formulae - Electron Configuration - Atomic Spectra + Formulae - Flame Tests - Melting/Boiling point patterns in Modern Periodic Table - Group 2 Properties - Thermal Stability - Charge Density
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- Kira Bohr
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