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Vilka [71]
2 years ago
15

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

Chemistry
1 answer:
timama [110]2 years ago
7 0

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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