Definition von isotopically im Englisch Englisch wörterbuch
(Chemistry) as pertains to isotopes, by means of isotopes (form of a chemical element which has the same atomic number as the other forms but a different atomic weight)
Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. As a consequence, atoms for the same isotope will have the same atomic number but a different mass number (atomic weight)
An isotope of an element has the same number of protons, but a different number of neutrons as a normal atom Because isotopes contain more neutrons, they are heavier than normal atoms, causing them to behave slightly differently This is why isotope ratios are important to study
Atoms of the same element that have the same number of protons (and hence the same chemical properties), but a different number of neutrons, and therefore, different atomic weights
Atoms that have the same number of protons but a different number of neutrons They are atoms of the same element that have different masses The isotope number is the number of protons plus the number of neutrons More about isotopes
One of a group of nuclides that have the same number of protons in their nuclei and a different number of neutrons Many elements have isotopes that are unstable, undergo radioactive decay and emit ionizing radiation as they decay or transform into other elements or isotopes
One of multiple forms of an element that has a different number of neutrons than other atoms of that element Some elements have isotopes that are unstable or radioactive, while others have "stable isotopes " Stable isotopes are not radioactive, and do not decay over time For example, most nitrogen atoms have 14 neutrons, while a very small percentage of naturally-occurring nitrogen atoms have 15 neutrons These 15N atoms are referred to as stable isotopes It is possible to use special equipment to determine how much of a stable isotope is present in something For example, scientists can take a leaf sample and determine how much of the nitrogen present in the leaf has 14 neutrons and how much has 15 neutrons Because stable isotopes do not break down, and because scientists can measure exact quantities present in samples, it is possible to use stable isotopes as tracers
Any of two or more atoms of an element having the same number of protons, but a different number of neutrons in its nucleus. As a consequence, it will have the same atomic number but a different mass number (atomic weight)
A species of nucleus with a fixed number of protons and neutrons The term isotope is usually used to distinguish nuclear species of the same chemical element (i e , those having the same number of protons, but different numbers of neutrons), such as iodine 127 and iodine 131
One of two or more forms of a single element; the atoms of each isotope have the same number of protons but different numbers of neutrons in their nuclei Thus isotopes have the same atomic number but differ in atomic mass
Atoms having the same number of protons but a different number of neutrons Two isotopes of the same atom are chemically similar to each other, and therefore difficult to separate, but may have different nuclear properties Isotopes are designated by their atomic mass numbers (total number of protons and neutrons) Uranium 235 and uranium 238 are isotopes
Isotopes are atoms that have the same number of protons and electrons but different numbers of neutrons and therefore have different physical properties. tritium, a radioactive isotope of hydrogen. one of the possible different forms of an atom of a particular element (=simple chemical substance) (iso- + topos ). One of two or more species of atoms of a chemical element having nuclei with the same number of protons but different numbers of neutrons. They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses. Most elements found in nature are mixtures of several isotopes; tin, for example, has 10 isotopes. In most cases, only stable isotopes of elements are found in nature. The radioactive forms break down spontaneously into different elements (see radioactivity). Isotopes of all elements heavier than bismuth are radioactive; some occur naturally because they have long half-lives
Two nuclei of the same element which have the same atomic number but different masses They contain the same number of protons but a different number of neutrons Uranium-238 contains 92 protons and 146 neutrons while the isotope U-235 contains 92 protons and 143 neutrons Thus the atomic weight (atomic mass) of U-238 is three higher than of U-235
Different forms of atoms of the same element They have the same number of protons in their nuclei but a different number of neutrons (the same atomic number but different atomic weights) Uranium-238 and uranium-235 are isotopes of uranium Isotopes may be stable (not spontaneously decaying) or unstable (spontaneously decaying, emitting ionizing radiation)
one of two or more species of atoms of the same chemical element that have the same atomic number and occupy the same position in the periodic table They are nearly identical in chemical behavior, but they differ in atomic mass or mass number Therefore, they behave differently in the mass spectrograph, in radioactive transformations, and in physical properties, and may be separated or detected by means of these differences
An atomic form of an element having a particular number of neutrons Different isotopes of an element have the same number of protons but different numbers of neutrons and hence different atomic mass, eg U-235, U-238 Some isotopes are unstable and decay (qv) to form isotopes of other elements J-O
One of two or more forms of an element that have the same number of protons (atomic number) but differing numbers of neutrons (mass numbers) Radioactive isotopes are commonly used to make DNA probes and metabolic tracers
Atoms of the same element that have an equal number of protons (and hence the same chemical properties) but a different number of neutrons and, therefore, different atomic weights Although chemical properties are the same, radioactive and nuclear (radioactive decay) properties may be quite different for each isotope of an element
a sub-group of an element in which the atomic nucleus has the same number of neutrons, as well as, the same number of protons All of the atoms of an element will have very nearly the same chemical properties, but the isotopes can have very different nuclear properties