Chemistry unit 2

Jun 28th, 2015
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. Identify protons, neutrons and electrons as sub-atomic particles and describe their relative mass, charge and position within the atom

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Chemistry unit 21. Identify protons, neutrons and electrons as sub-atomic particles and describe their relative mass, charge and position within the atomAtoms are the smallest unit of matterThey are units (one) in the way that an egg is one and is made up of layer shell white and yolk.An atoms is made up of protons neutrons and electronsAtomic number = number of protonsMass number = protons + neutronsProtons: positive particles weight of 1 AMU (atomic mass unit)Neutron: Neutral particles (no charge) weight of 1 AMUElectron: Negative particles virtually no mass.2. raw diagrams showing the arrangement of sub-atomic particles within atoms, placing electrons in their correct energy levels (first 20 elements) 4. Describe the electron configuration of the first 20 elements given their atomic number.1st level: 2 electrons2nd level: 8 electrons3rd level: 8 electrons4th level: 18 electronsExamples of diagrams: Atomic numberAtomSymbolAtom NameProtonsNeutronsElectronsElectron configurationMass Number1HHydrogen10111.007942HeHelium22224.0033LiLithium3432, 16.9414BeBeryllium4542, 29.0121825BBoron5652, 310.8116CCarbon6662, 412.01077NNitrogen7772, 514.006748OOxygen8882, 615.99949FFluorine91092, 718.998403210NeNeon1010102, 820.179711NaSodium1112112, 8, 122.98977012MgMagnesium1212122, 8, 224.305013AlAluminium1314132, 8, 326.98153814SiSilicon1

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