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Lc Atomic Structure Sound
1. Atomic Structure Atom Three Particles Protons Neutrons Electrons In nucleus Outside the nucleus Relative Mass of Proton: 1 Relative Mass of Neutron: 1 Relative Mass of Electron: _1_ 1836 Relative Charge of Proton: Positive Relative Charge of Neutron: Neutral Relative Charge of Electron: Negative Nucleon Number Mass Number Proton Number Atomic Number 2.8.8 Rule Electron Arrangement of O atom Arrangements of Electrons in Shells 1 st Shell: Up to 2 electrons 2 nd Shell: Up to 8 electrons 3 rd Shell: Up to 8 electrons O Isotopes: Atoms of the same element with the same number of protons but different number of neutrons. Isotopes have same chemical properties but different physical Properties. Use of Isotopes: Use as heart pacemarker Negative Neutral Positive Charge 1/1836 1 1 Mass Electrons Neutrons Protons 16 O 8 The number of protons and neutrons found in an atom. Mass Number The number of protons is the same as number of electrons. The number of protons found in an atom. Proton Number