neutrons, i think
nucleons = protons + neutrons
I know.
protons and neutrons in the nucleus of an atom. Isotopes of an element have the same number of protons but different numbers of neutrons. The number of neutrons in an atom affects its stability and often determines its nuclear properties.
The atomic mass of an isotope is the weighted average of the masses of the naturally occurring isotopes of an element. It is found by multiplying the mass of each isotope by its natural abundance and summing these values. The mass number of an isotope is the total number of protons and neutrons in its nucleus and can be found by rounding the atomic mass to the nearest whole number.
The number of neutrons in an isotope can vary depending on the specific isotope. Neutrons are located in the nucleus of an atom and their number can be determined by subtracting the atomic number (number of protons) from the atomic mass (protons + neutrons).
An isotope is identified by atomic number (element number or name), by mass number, and by atomic weight. The mass numberfor an isotope is listed as a leading superscript such as 29Si, which in this example is silicon containing 14 protons and 15 neutrons (a rarer but stable isotope of the element). Similarly the atomic weight is indicated by a superscript such as U235 , an isotope of uranium having 92 protons and 143 neutrons.The actual atomic weight is often expressed as a decimal number corresponding to the mass of the atom in "atomic units", where a proton is about 1.0072, a neutron 1.0086, and an electron about .00055 atomic units.
The isotope represented by the drawing is Carbon-13. This isotope has 6 protons and 7 neutrons in its nucleus, giving it a total atomic mass of 13.
Strontium-88 is an isotope of strontium that has 52 neutrons. It has an atomic number of 38, therefore the total number of neutrons (52) is obtained by subtracting the atomic number from the mass number.
The atomic mass of an isotope is the weighted average of the masses of the naturally occurring isotopes of an element. It is found by multiplying the mass of each isotope by its natural abundance and summing these values. The mass number of an isotope is the total number of protons and neutrons in its nucleus and can be found by rounding the atomic mass to the nearest whole number.
The number of neutrons in an isotope can vary depending on the specific isotope. Neutrons are located in the nucleus of an atom and their number can be determined by subtracting the atomic number (number of protons) from the atomic mass (protons + neutrons).
An isotope is identified by atomic number (element number or name), by mass number, and by atomic weight. The mass numberfor an isotope is listed as a leading superscript such as 29Si, which in this example is silicon containing 14 protons and 15 neutrons (a rarer but stable isotope of the element). Similarly the atomic weight is indicated by a superscript such as U235 , an isotope of uranium having 92 protons and 143 neutrons.The actual atomic weight is often expressed as a decimal number corresponding to the mass of the atom in "atomic units", where a proton is about 1.0072, a neutron 1.0086, and an electron about .00055 atomic units.
The isotope represented by the drawing is Carbon-13. This isotope has 6 protons and 7 neutrons in its nucleus, giving it a total atomic mass of 13.
The mass number is the total number of protons plus neutrons in the nucleus. The atomic number is the total number of protons in the nucleus. So subtract the atomic number from the mass number and that will give you the total number of neutrons in the nucleus.
The correct nuclear notation for an isotope with atomic number 15 (phosphorus) and mass number -15 does not exist. Mass number should be a positive whole number, representing the total number of protons and neutrons in the nucleus.
The number of protons in an atom of uranium is represented by its atomic number, which is 92. The total number of protons and neutrons in an atom of uranium is known as its atomic mass number. For uranium, the most common isotope has an atomic mass number of 238, which indicates the sum of protons (92) and neutrons (146).
The isotope number refers to the total number of protons and neutrons in the nucleus of an atom of a specific element. It is used to distinguish between different isotopes of an element based on their atomic mass.
The number of neutrons can be calculated by subtracting the atomic number from the atomic weight. In this case, for oxygen with an atomic number of 8 and an atomic weight of 18, it would have 10 neutrons (18 - 8 = 10).
The number of neutrons is never directly displayed.For a given isotope of an element, the "top number" (e.g. 14C or carbon-14) is the atomic mass number, the total of neutrons and protons. To find the number of neutrons, subtract the atomic number from the isotopes atomic mass number. Here, 14C will have 8 neutrons.
There is no element 254. Elements are identified by their names and by their atomic numbers, the number of protons in the nucleus. Atomic numbers do not go up much past 110, if that far. However, element 99, Einsteinium, does have an atomic mass of 254, which describes the total number of protons and neutrons in its most common isotope. Perhaps that is what you mean.
The number written after the isotope in the name indicates the mass number of the isotope. It represents the total number of protons and neutrons in the nucleus of the atom.