Carbon-12 and carbon-13 are stable.
The fact that carbon-14 is unstable, with a relatively short half-life (very short compared to the age of the Solar System) means that it must needs have been produced more recently than the creation of the Solar System.
On many Periodic Tables, the small number directly below the chemical symbol is the atomic mass. On mine, there is a small 12.011 under the large C for carbon. While most carbon is 12, there are naturally occurring carbon13 and carbon14, so this is an average mass of all naturally occurring isotopes, with the majority of isotopes being carbon12
Carbon-14 contains more neutrons compared to carbon-12. Carbon-12 has 6 neutrons, while carbon-14 has 8 neutrons. The number of protons and electrons in both carbon isotopes remains the same, at 6 each.
All atomic masses are determined by comparing them to the mass of an atom of carbon12. One atomic mass unit equals one twelfth the mass of an atom of carbon12. That's why its called relativeatomic mass.
Carbon's atomic mass is ~12.0107. All of those decimals at the end tell us that there is more than one isotope of carbon. If you round the number, you will find the most common isotope of carbon. (Carbon12)IUPAC recommend in this case the expression atomic weight, not atomic mass.The atomic weight of carbon (IUPAC Table, 2009) is [12,0096; 12,0116]. This mean that the atomic weight is variable between the above mentioned limits, depending on the type of the sample.
The meaning is the existence of a triple bond in alkynes.
6.023 x 1023
It will take practically forever. Carbon-12 is not radioactive.
Scientists know that the isotopes Carbon-12 and Carbon-14 are both forms of carbon, but they differ in the number of neutrons they contain. Carbon-12 is the most common form of carbon and is stable, while Carbon-14 is radioactive and is used in radiocarbon dating to determine the age of organic materials.
On many Periodic Tables, the small number directly below the chemical symbol is the atomic mass. On mine, there is a small 12.011 under the large C for carbon. While most carbon is 12, there are naturally occurring carbon13 and carbon14, so this is an average mass of all naturally occurring isotopes, with the majority of isotopes being carbon12
Carbon-14 contains more neutrons compared to carbon-12. Carbon-12 has 6 neutrons, while carbon-14 has 8 neutrons. The number of protons and electrons in both carbon isotopes remains the same, at 6 each.
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.
Carbon-12 and carbon-13 are stable. The fact that carbon-14 is unstable, with a relatively short half-life (very short compared to the age of the Solar System) means that it must needs have been produced more recently than the creation of the Solar System.
All atomic masses are determined by comparing them to the mass of an atom of carbon12. One atomic mass unit equals one twelfth the mass of an atom of carbon12. That's why its called relativeatomic mass.
Carbon's atomic mass is ~12.0107. All of those decimals at the end tell us that there is more than one isotope of carbon. If you round the number, you will find the most common isotope of carbon. (Carbon12)IUPAC recommend in this case the expression atomic weight, not atomic mass.The atomic weight of carbon (IUPAC Table, 2009) is [12,0096; 12,0116]. This mean that the atomic weight is variable between the above mentioned limits, depending on the type of the sample.
isotopes of carbon
polymorphism
The meaning is the existence of a triple bond in alkynes.