the atom. electron clouds major energy levelmaximum number of electrons k2 electrons l8 electrons...

The atom

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Electron Clouds

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Major energy level Maximum number of electronsK 2 electronsL 8 electronsM 18 electronsN 32 electronsO 32 electronsP 18 electronsQ 2 electrons

Atomic Number

• Atomic Number Number of Protons in the Nucleus

• Atomic Mass Average weight of an element’s atom

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Periodic Table

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Hydrogen

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CarbonQuickTime™ and a

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Oxygen

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Water Molecule

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Carbon Dioxide Molecule

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Sodium atom

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Chloride atom

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Sodium Chloride molecule

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Sodium Chloride in Water

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IsotopesAtoms of the same element that have different

numbers of neutrons in the nucleus

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Isotopes of Carbon

• Carbon 12 6 protons, 6 neutrons, 6 electrons

• Carbon 13 6 protons, 7 neutrons, 6 electrons

• Carbon 14 6 protons, 8 neutrons, 6 electrons Radioactive