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Sodium (Na) P= N= E= + + + + + + + + + + + - - -- - - -- - - - 11 12 11 Atomic Number = Atomic Mass = 11 23 12 neutrons +11 protons 23
Oxygen (O) + + + + + + + + - - - - - -- - P= N= E= 8 8 8 8 neutrons + 8 protons 16 Atomic Number = Atomic Mass = 8 16
Helium (He) + + P= N= E= 2 2 2 Atomic Number = Atomic Mass = 2 4 2 neutrons + 2 protons 4
Lithium (Li) + ++ P= N= E= 3 4 3 Atomic Number = Atomic Mass = 3 7 4 neutrons + 3 protons 7
Neon (Ne) + + + + ++ + + + + - - -- - - -- - - P= N= E= 10 Atomic Number = Atomic Mass = 10 20 10 neutrons +10 protons 20
Calcium (Ca) + + + + + + + + + + + + + + + + + + + + - - -- - - - - - - -- - - -- - - - - P= N= E= 20 Atomic Number = Atomic Mass = 20 40 20 neutrons +20 protons 40
Aluminum (Al) + + + + + + + + + + + + + - - - - -- - - -- -- - P= N= E= 13 14 13 Atomic Number = Atomic Mass = 13 27 14 neutrons +13 protons 27
Fluorine (F) + + + + + + + + + - - - - - - -- - P= N= E= 9 10 9 Atomic Number = Atomic Mass = 9 19 10 neutrons + 9 protons 19
Beryllium (Be) + + + + - - - - P= N= E= 4 5 4 Atomic Number = Atomic Mass = 4 9 5 neutrons + 4 protons 9
Phosphorus (P) + - + + + + + + + + + + + + + + - -- - - -- - - -- - - - P= N= E= 15 16 15 Atomic Number = Atomic Mass = 15 31 16 neutrons +15 protons 31
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