№25 Марганец Ar=55, Z=+25, p⁺=25, n⁰=55-25=30, e⁻=25
№13 Алюминий Ar=27, Z=+13, p⁺=13, n⁰=27-13=14, e⁻=13
№5 Бор Ar=11, Z=+5, p⁺=5, n⁰=11-5=6, e⁻=5
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№25 Марганец Ar=55, Z=+25, p⁺=25, n⁰=55-25=30, e⁻=25
№13 Алюминий Ar=27, Z=+13, p⁺=13, n⁰=27-13=14, e⁻=13
№5 Бор Ar=11, Z=+5, p⁺=5, n⁰=11-5=6, e⁻=5