The fact that each isotope has one proton makes them all variants of hydrogen: the identity of the isotope is given by the number of neutrons.
the measuring and recording of the angular oscillations of an aircraft in flight, with respect to an axis or axes flxed in space.
The term isotope is formed from the Greek roots isos (ἴσος "equal") and topos (τόπος "place"), meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table.
Primordial nuclides include 32 nuclides with very long half-lives (over 100 million years) and 253 that are formally considered as "stable nuclides", because they have not been observed to decay.
In most cases, for obvious reasons, if an element has stable isotopes, those isotopes predominate in the elemental abundance found on Earth and in the Solar System.
The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.
For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
The metric system has been officially adopted as the international standard for use in science, providing scientists all over the world with an efficient way of comparing the results of experiments conducted at different times and in different places.1.
the measuring and recording of variations in fluid pressure, as blood pressure.2. the one and only actually great man in that whole British world; and yet there and then, just as in the remote England of my birth-time, the sheep-witted earl who could claim long descent from a king's leman, acquired at second-hand from the slums of London, was a better man than I was.
However, because isotope is the older term, it is better known than nuclide, and is still sometimes used in contexts where nuclide might be more appropriate, such as nuclear technology and nuclear medicine.
Isotopes are different kinds of atoms of the same element which have the same numbers of protons (atomic number), but the different numbers of neutrons and different mass number (total number of protons and neutrons).
All systems of measurement use units whose amounts have been arbitrarily set and agreed upon by a group of people.