Answer:
1. Oxygen (0) Atom
Number of Protons (+)=8
Number of neutrons (o)=8
Number of electrons (-)=8
2. Sodium (Na) Atom
Number of Protons (+)=11
Number of neutrons (o)=12
Number of electrons (-)=11
3. Beryllium (Be) Atom
Number of Protons (+)=4
Number of neutrons (o)=5
Number of electrons (-)=4
Explanation:
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