Note that since all carbon isotopes have an atomic number of 6, it is not necessary to state the atomic number; the fact that it is carbon means that it has the atomic number 6. So the isotope with a mass number of 14 is called carbon 14. As a symbol, it is C with a superscript 14 (which I am not able to type).
The atomic number of carbon is 6, which means it has 6 protons. Carbon-14 is an isotope of carbon, so it also has 6 protons. The difference between isotopes lies in the number of neutrons, and carbon-14 has 8 neutrons, making it a radioactive isotope used in carbon dating.
Most carbon atoms have 6 neutrons, but a small fraction of them have 7 neutrons (to make carbon-13 isotope atoms) or 8 neutrons to make carbon-14 isotopes. Radioactive carbon atoms with other numbers of neutrons can be made in nuclear reactions.
The general formula for calculation is:Atomic weight = (atomic mass of the isotope a X fraction of the isotope a) + (atomic mass of the isotope b X fraction of the isotope b) + .......(atomic mass of the isotope n X fraction of the isotope n)Don't confuse atomic weight with atomic mass, mass number or atomic number.For carbon:Atomic weight = (12 x 0,9893) + (13,0033548378 x 0,0107) = 12,0107After IUPAC tables from 2009 the atomic weight of carbon is writed as[12,0096; 12,0116].
Isotopes notation is a way to represent a specific isotope of an element using the element's symbol along with the mass number and atomic number. The notation typically includes the atomic number as a subscript and the mass number as a superscript next to the element's symbol. For example, carbon-14 is represented as ^14_6C.
The isotope used as the reference for atomic masses is carbon-12, with a mass of 12 atomic mass units (amu).
carbon 12
notation for an isotope of an element where the subscript is the atomic number, the superscript it the mass number, and they are attached on the left of the symbol for the element.Example: 11H (kind of like that, but with no space between the 1s, it's just 1 directly over 1, then H)
Carbon is a non metal element. Atomic number of it is 6.
Carbon-12 isotope is used to define the atomic mass unit, which is equal to 1/12th of the mass of a carbon-12 atom.
The atomic number of carbon is 6, which means it has 6 protons. Carbon-14 is an isotope of carbon, so it also has 6 protons. The difference between isotopes lies in the number of neutrons, and carbon-14 has 8 neutrons, making it a radioactive isotope used in carbon dating.
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 12 in Carbon-12 designates the isotope which has an atomic mass of 12. This is the most abundant isotope of carbon. Carbon has an atomic number of 6, therefore it has 6 protons. Carbon 12, therefore has 6 neutrons. Carbon 14 is another isotope of carbon, still having 6 protons, but has 8 neutrons, so it has an atomic mass of (6 + 8 = 14). See related link for more information on carbon isotopes.
An element is defined by the number of protons in the nucleus; for example, carbon always has 6 protons. Elements can also have different numbers of neutrons in the atomic nucleus, and each number of neutrons gives you a different isotope. So, there is the isotope called carbon 12, with 6 neutrons (12 nuclear particles in total) and there is also the isotope called carbon 14, with 8 neutrons (14 nuclear particles in total). Every element has a number of isotopes.
Most carbon atoms have 6 neutrons, but a small fraction of them have 7 neutrons (to make carbon-13 isotope atoms) or 8 neutrons to make carbon-14 isotopes. Radioactive carbon atoms with other numbers of neutrons can be made in nuclear reactions.
The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom (when the atom is motionless). Relative isotopic mass is the relative mass of a given isotope scaled with carbon-12 as exactly 12.
Subtract the atomic number from the mass number. Example Carbon-12 an isotope with a mas number of 12. Carbon has an atomic number of 6 therefore carbon-12 has 6 neutrons.
The isotope number and the atomic number can be used to calculate the number of neutrons. Consider carbon-14. The atomic number for carbon is 6 (i.e., the number of protons is 6). The isotope number of carbon-14 (i.e., 14 = protons + neutrons). Subtract the atomic number from the isotope number calculate the number of neutrons (8 for carbon-14).