Question

Рассчитайте число протонов и нейтронов в ядре атомов следующих элементов, зная их порядковые номера и атомные массы: Na, P, Ar, Al,Fe,Pb

Answer 1

Na p=11 n=23-11=12; Ar p=18 n=40-18=22; Al p=13 n=27-13=14;  Fe p=26 n=56-26=30  Pb p=82 n=207-82= 125 

Answer 2

Number of Protons and Neutrons in the Nuclei of Elements

To calculate the number of protons and neutrons in the nuclei of the given elements (Na, P, Ar, Al, Fe, Pb), we can use their atomic numbers and atomic masses.

1. Sodium (Na): - Atomic number (Z): 11 - Atomic mass (A): 22.99 amu - Number of protons (Z): 11 - Number of neutrons (N): A - Z = 22.99 - 11 = 11.99 ≈ 12 2. Phosphorus (P): - Atomic number (Z): 15 - Atomic mass (A): 30.97 amu - Number of protons (Z): 15 - Number of neutrons (N): A - Z = 30.97 - 15 = 15.97 ≈ 16 3. Argon (Ar): - Atomic number (Z): 18 - Atomic mass (A): 39.95 amu - Number of protons (Z): 18 - Number of neutrons (N): A - Z = 39.95 - 18 = 21.95 ≈ 22 4. Aluminum (Al): - Atomic number (Z): 13 - Atomic mass (A): 26.98 amu - Number of protons (Z): 13 - Number of neutrons (N): A - Z = 26.98 - 13 = 13.98 ≈ 14 5. Iron (Fe): - Atomic number (Z): 26 - Atomic mass (A): 55.85 amu - Number of protons (Z): 26 - Number of neutrons (N): A - Z = 55.85 - 26 = 29.85 ≈ 30 6. Lead (Pb): - Atomic number (Z): 82 - Atomic mass (A): 207.2 amu - Number of protons (Z): 82 - Number of neutrons (N): A - Z = 207.2 - 82 = 125.2 ≈ 125 Therefore, the number of protons and neutrons in the nuclei of the given elements are as follows:

- Sodium (Na): 11 protons, 12 neutrons - Phosphorus (P): 15 protons, 16 neutrons - Argon (Ar): 18 protons, 22 neutrons - Aluminum (Al): 13 protons, 14 neutrons - Iron (Fe): 26 protons, 30 neutrons - Lead (Pb): 82 protons, 125 neutrons

Please note that the values provided are approximate and may vary slightly depending on the source.

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