You mean the mass of the isotope? Then Bain Bridge mass spectrograph is the device which helps to separate the isotopes and determine the mass of different isotopes accurately.
The most common instrument used to measure isotopes is a mass spectrometer. Mass spectrometry allows scientists to accurately determine the mass and abundance of isotopes in a sample. It works by ionizing the atoms in the sample and separating them based on their mass-to-charge ratio.
The most common isotope of carbon is carbon-12.The most common isotope of carbon is carbon-12.The most common isotope of carbon is carbon-12.The most common isotope of carbon is carbon-12.
The most common plutonium isotope is plutonium 239.
The most common plutonium isotope is plutonium 239.
Se-80 is the most common isotope.
K-39 isotope has 20 neutrons
The most common instrument (tool) is a tape measure.
The most common isotope of carbon is carbon-12.The most common isotope of carbon is carbon-12.The most common isotope of carbon is carbon-12.The most common isotope of carbon is carbon-12.
The most common isotope of silicon is the isotope 28Si: 92,23 %.
Vanadium-51 is the most common isotope.
The most common plutonium isotope is plutonium 239.
The most common natural isotope is 238U: 99,2742 %.
The most common plutonium isotope is plutonium 239.
Se-80 is the most common isotope.
K-39 isotope has 20 neutrons
The most common is carbon 14.
Phosphorus-31 is the most common isotope. (Wikipedia)
A spectrometer is used to measure properties of light. The most common usage is as an instrument attached to a telescope for astronomers to measure the chemical elements in a star.