What are the number of protons, neutrons, and electrons in the following isotopes ?
31 ^ 15 P
The isotope 31^15 P has 15 protons, 16 neutrons, and 15 electrons.
To determine the number of protons, neutrons, and electrons in an isotope, we need to understand its atomic notation.
The atomic notation consists of the chemical symbol of the element, the atomic number, and the mass number.
In the case of 31^15P:
- The chemical symbol is P, which represents the element phosphorus.
- The atomic number is 15, which indicates the number of protons in the nucleus of the phosphorus atom.
- The mass number is 31, which represents the sum of protons and neutrons in the nucleus.
So, in the isotope 31^15P:
- The number of protons is equal to the atomic number, which is 15.
- The number of neutrons is calculated by subtracting the atomic number from the mass number: (31 - 15) = 16.
- The number of electrons in an atom is generally the same as the number of protons, so in this case, it is also 15.
Therefore, in the isotope 31^15P:
- The number of protons is 15.
- The number of neutrons is 16.
- The number of electrons is 15.
To determine the number of protons, neutrons, and electrons in an isotope, you need to understand its atomic number and mass number.
The atomic number (represented by the bottom left subscript) indicates the number of protons in an atom. In this case, the atomic number is 15, which means the isotope has 15 protons.
The mass number (represented by the top left superscript) indicates the total number of protons and neutrons in the atom. In this case, the mass number is 31.
To find the number of neutrons, subtract the atomic number (protons) from the mass number. In this example, subtracting 15 (protons) from 31 (mass number) gives 16 neutrons.
Finally, to find the number of electrons, you typically assume that an atom is neutral, meaning it has an equal number of protons and electrons. So, in this case, there would be 15 electrons.
To summarize:
Number of protons = 15
Number of neutrons = 31 - 15 = 16
Number of electrons = 15