2713071
Description
Flashcards by zaroon_riaz, updated more than 1 year ago
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Created by zaroon_riaz
almost 9 years ago
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| Question | Answer |
| Topic 1 | Discovering Chemistry |
| Mendeleev's periodic table | > arranged in increasing atomic mass > similar properties lined up > used this to predict undiscovered elements and left gaps for them |
| Structure of the atom | > Nucleus : protons and neutrons (equal in a neutral atom) > Surrounded by energy shells filled with specific numbers of ectrons |
| Relative charge and mass on each subatomic particle | > Proton: +1 charge: 1 mass > Neutron: 0 charge: 1 mass > Electron: -1 charge: negligible mass |
| Atomic number Atomic mass Relative atomic mass | AN: number of protons AM: protons and neutrons RAM: every element compared to a carbon-12 |
| Structure of modern periodic table | > horizontal lines : increasing atomic number : periods > vertical lines : similar properties : groups |
| Isotopes | Variation of an element with the same number of protons and different number of neutrons |
| Calculate Relative Atomic Mass | (p1*an1) + (p2*an2) / 100 |
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