No, only in special cases.
Generally you'd also like to know the mass number (m) to calculate the neutron number (n) from the atomic number (z)
m = n + z, so n = m - z
(Remember that atomic number z = p which is the number of protons, so also valid:
m = n + p, so n = m - p )
To find the number of neutrons in an element, you need to know its atomic mass (rounded to the nearest whole number) and its atomic number. The atomic number represents the number of protons in the nucleus, and since the number of neutrons can vary (resulting in different isotopes), you can calculate the number of neutrons by subtracting the atomic number from the atomic mass: Neutrons = Atomic Mass - Atomic Number. For example, if an element has an atomic mass of 12 and an atomic number of 6, it has 12 - 6 = 6 neutrons.
The atomic number of an atom represents the number of protons in its nucleus and defines the element. If you know the number of neutrons, you can find the mass number by adding the number of protons (the atomic number) to the number of neutrons. This relationship can help you identify the specific isotope of the element, as isotopes differ in their neutron count while having the same atomic number. Thus, knowing either the atomic number or the number of neutrons allows you to gather information about the atom's identity and its isotopes.
Since the mass number is protons plus neutrons, it would have 5 neutrons.
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Mass number = no. of protons + neutrons Atomic number = no. of protonsThus (mass number - atomic number) gives you no. of neutrons.Therefore for phosphorus, the number of neutrons would be 16.
The Atomic Mass is equal to the number of protons plus neutrons. So if you know the atomic number then you can find out the number of neutrons Atomic # is the amount of Protons or Electrons Atomic Mass- Number of protons plus neutrons Atomic Mass-Atomic Number = Amount of neutrons
To find the number of neutrons in an element, you need to know its atomic mass (rounded to the nearest whole number) and its atomic number. The atomic number represents the number of protons in the nucleus, and since the number of neutrons can vary (resulting in different isotopes), you can calculate the number of neutrons by subtracting the atomic number from the atomic mass: Neutrons = Atomic Mass - Atomic Number. For example, if an element has an atomic mass of 12 and an atomic number of 6, it has 12 - 6 = 6 neutrons.
You can find the number of neutrons in an atom by subtracting the atomic number (number of protons) from the atomic mass number (rounded atomic weight). The atomic mass number represents the sum of protons and neutrons in the nucleus.
The atomic number of an atom represents the number of protons in its nucleus and defines the element. If you know the number of neutrons, you can find the mass number by adding the number of protons (the atomic number) to the number of neutrons. This relationship can help you identify the specific isotope of the element, as isotopes differ in their neutron count while having the same atomic number. Thus, knowing either the atomic number or the number of neutrons allows you to gather information about the atom's identity and its isotopes.
Subtracting the atomic number from the mass number gives the number of neutrons. The atomic number is the number of protons in the nucleus. The mass number is the total number of protons and neutrons in the nucleus and this is the number that is quoted against isotopes, for example fluorine-19 contains 19 protons and neutrons. Fluorine has an atomic number of 9 so it has 10 neutrons.
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.
You look up antimony. You discover its symbol is SB. You look on your periodic table. You come to the symbol SB. You see that it is number 51. You know that is also the number of protons in the atom. You know that 122 is the atomic weight. You know that the Atomic Weight mainly comes from the weight of the neutrons and protons. You know that when you have the atomic weight you can subtract the atomic number from the atomic weight and get the number of neutrons.
Since the mass number is protons plus neutrons, it would have 5 neutrons.
It is impossible to determine the number of neutrons from the mass number and atomic mass, since the two are essentially same value. However, with the atomic number and the mass number, one can calculate the number of neutrons by subtracting the atomic number from the mass number.
The answer is that it is neutrons that account for the difference between atomic weight and atomic number. The atomic number is the number of protons or the number of electrons in the atom, since they are normally equal. The atomic weightis the sum of the total number of protons, electrons AND neutrons in the atom. Knowing both the atomic number and the atomic weight of an atom lets you know the number of neutrons in the atom (the isotope). Example: Uranium, Atomic Number 92, Atomic Weight 235. The atomic number tell you that the uranium atom has 92 protons and 92 electrons. The atomic weight tells you that it has a combined total of 235 protons, electrons and neutrons. Since you know from the atomic number that there is a total of 184 protons and electrons in the atom (92 + 92) and from the atomic weight that the total number of protons, electons and neutrons is 235 (92 + 92 + X = 235), you now know that there are 151 neutrons in that uranium atom. The atomic number and atomic weight together tell you that the uranium atom 235 has 92 protons, 92 electons and 151 neutrons.
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Mass number = no. of protons + neutrons Atomic number = no. of protonsThus (mass number - atomic number) gives you no. of neutrons.Therefore for phosphorus, the number of neutrons would be 16.