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Naresh Periodic Table
- 8. Nuclide notation – how many protons, neutrons, and electrons in atoms? 37 Mass number (protons + neutrons) Cl 17 Atomic number (number of protons) – 20 number of neutrons As atoms have no charge , the number of electrons is the same as the number of protons. This atom has 17 electrons.
- 9. Nuclide notation – how many protons, neutrons, and electrons in ions? 23 Mass number (protons + neutrons) Na + 11 Atomic number (number of protons) – 12 number of neutrons 1+ charge means 1 electron less than the number of protons. This atom has 10 electrons.
- 10. Nuclide notation – how many protons, neutrons, and electrons in ions? 16 Mass number (protons + neutrons) O 2– 8 Atomic number (number of protons) – 8 number of neutrons 2– charge means 2 electrons more than the number of protons. This atom has 10 electrons.
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