The isotope symbol for an element with 6 protons and a mass number of 15 is C-15.
The symbol for the isotope would be B and the atomic number would be 5, as the mass number is the sum of the protons and neutrons in the nucleus, so in this case: 5 protons + 10 neutrons = mass number 15.
Phosphorus has 15 protons and 15 electrons in a neutral atom. The number of neutrons can vary in different isotopes of phosphorus, but the most common isotope has 16 neutrons.
Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.
Nitrogen-15 has 15 protons and neutrons, while nitrogen-9 has only 9 protons and neutrons. Nitrogen-15 is a stable isotope, while nitrogen-9 is not stable and undergoes radioactive decay.
The isotope with 16 protons and 15 neutrons is oxygen-31.
An atom with 13 protons and 15 neutrons is an isotope of aluminum (symbol Al).
The mass number of an isotope is the sum of its protons and neutrons. Since silicon has 14 protons, the isotope with 15 neutrons would have a mass number of 14 (protons) + 15 (neutrons) = 29.
The isotope with 15 protons, 16 neutrons, and 15 electrons is oxygen-31.
This shows the isotope Oxygen-15. It has 7 protons and 8 neutrons in its nucleus.
The isotope symbol for an element with 6 protons and a mass number of 15 is C-15.
An atom with 15 protons, 15 neutrons, and 15 electrons.
The symbol for the isotope would be B and the atomic number would be 5, as the mass number is the sum of the protons and neutrons in the nucleus, so in this case: 5 protons + 10 neutrons = mass number 15.
Nitrogen has 7 protons, 7 neutrons, and 7 electrons.
The element with 30 neutrons and 15 electrons is phosphorus. The number of neutrons in an element is determined by subtracting the atomic number from the atomic mass. Since phosphorus has an atomic number of 15 and an atomic mass of approximately 31, it has 30 neutrons.
The element with 7 electrons, 7 protons, and 8 neutrons is nitrogen-15 (15N).
The chemical symbol for nitrogen is N. Since the isotope has 8 neutrons, the sum of protons and neutrons for this isotope (mass number) would be 8 + 7 (number of protons in nitrogen) = 15. Therefore, the atomic number for nitrogen is 7 and the mass number is 15. The symbol with subscript and superscript would be ^15_7N.