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Given the atomic
notation of 19/9 X, identify element X.
a fluorine
b neon
C potassium
d nickel
The notation [tex]^{19}_9X[/tex] refers to some element X that has 9 protons and 19 protons and neutrons (so that means 19-9 = 10 neutrons). The element that has 9 protons is fluorine (symbol F on the periodic table)
This means [tex]^{19}_9X[/tex] would update to [tex]^{19}_9F[/tex]
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