answer this question plz very urgent
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A) Atomic Mass=P+N=a+10=10+9=19u
B) Protons=N-1=9
C)E=P E=9
D)Sodium
Pls mark as brainliest
B) Protons=N-1=9
C)E=P E=9
D)Sodium
Pls mark as brainliest
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