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Sodium Nucleus: 11 protons, 12 neutrons Charge: +11 Aluminum Nucleus: 13 protons, 14 neutrons

Sodium Nucleus: 11 protons, 12 neutrons Charge: +11 Aluminum Nucleus: 13 protons, 14 neutrons Charge: +13. Mass number: total number of protons and neutrons in a nucleus. Sodium Atomic number: 11 Mass number: 23 (11+12).

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Sodium Nucleus: 11 protons, 12 neutrons Charge: +11 Aluminum Nucleus: 13 protons, 14 neutrons

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  1. Sodium Nucleus: 11 protons, 12 neutrons Charge: +11 Aluminum Nucleus: 13 protons, 14 neutrons Charge: +13

  2. Mass number: total number of protons and neutrons in a nucleus. Sodium Atomic number: 11 Mass number: 23 (11+12)

  3. Nuclide: atom characterized by a definite atomic number and mass number. Symbol of the element with the atomic number written as a subscript on the left and the mass number as a superscript on the left. Nuclide symbol for sodium is:

  4. Isotopes: atoms whose nuclei have the same atomic number but different mass numbers; that is the nuclei have the same number of protons but different numbers of neutrons. Naturally occurring oxygen: 99.759% oxygen-16 0.037% oxygen-17 0.204% oxygen-18

  5. Example 2.1 What is the nuclide symbol for a nucleus that contains 38 protons and 50 neutrons?

  6. A a a Aluminum

  7. Review questions in pairs Online activity Email me the answer to questions.

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