tomas485 tomas485
  • 04-01-2022
  • Chemistry
contestada

Write the symbol for every chemical element that has atomic number greater than 8 and atomic mass less than 25.5 u.

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3060XLXO 3060XLXO
  • 04-01-2022

F  atomic number 9, mass 19

Ne  atomic number  10, mass 20

Na  atomic number 11, mass 23

Mg  atomic number 12, mass 24

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