Definition of isotope in English:

isotope

noun ˈʌɪsətəʊpˈaɪsəˌtoʊp

Chemistry

Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
〔化〕同位素
some elements have only one stable isotope
radioactive isotopes of caesium, strontium, and plutonium
Example sentencesExamples
- Beta radiation is the emission of an electron from the nucleus of a radioactive isotope.
- Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues.
- Radioactive elements have different isotopes that decay at different rates.
- When uranium is bombarded with neutrons, the two isotopes have differing nuclear reactions.
- The nuclei of the hydrogen isotopes are the proton, the deuteron, and the triton.

Derivatives

isotopic

adjective ʌɪsəˈtɒpɪkˌaɪsəˈtɑpɪk

Chemistry

This points to a minor influence of diagenetic carbonate on the isotopic signal.
Example sentencesExamples
- Radiocarbon dating relies on the fact that carbon exists naturally in several isotopic forms.
- Ecologists see these isotopic ratios of carbon, hydrogen, oxygen, and nitrogen as signatures.
- Based on changes in isotopic composition, individual amino acids could be roughly divided into three groups.
- During subsequent logging, samples of core were selected for sectioning and for geochemical, mineralogical and isotopic analysis.

isotopically

adverb ʌɪsəˈtɒpɪk(ə)li

Chemistry

Likewise, isotopically substituted lipid membranes can be differentiated from protein adlayers and even each other with the proper selection of unique isotopic labels.
Example sentencesExamples
- During interglacial periods the ice caps melt and return the isotopically light water to the oceans, where it mixes rapidly.
- Consequently, white mica populations and even individual grains may represent compositionally and isotopically heterogeneous systems.
- With its origin in the local electron distribution, the chemical shift is a sensitive reporter of the chemical environment of isotopically labeled atoms.
- Winter and summer laminae differences are significant and are isotopically depleted with respect to water column organic carbon.

isotopy

noun ʌɪˈsɒtəpi

Chemistry

It is an excellent piece of work which considers loop and quasigroup identities that are invariant under isotopy, proving a number of very interesting results.

Origin

1913: coined by F. Soddy, from iso- 'equal' + Greek topos 'place' (because the isotopes occupy the same place in the periodic table of elements).

Rhymes

radioisotope

Definition of isotope in US English:

isotope

nounˈīsəˌtōpˈaɪsəˌtoʊp

Chemistry

Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
〔化〕同位素
some elements have only one stable isotope
radioactive isotopes of cesium, strontium, and plutonium
Example sentencesExamples
- The nuclei of the hydrogen isotopes are the proton, the deuteron, and the triton.
- Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues.
- Beta radiation is the emission of an electron from the nucleus of a radioactive isotope.
- Radioactive elements have different isotopes that decay at different rates.
- When uranium is bombarded with neutrons, the two isotopes have differing nuclear reactions.

Origin

1913: coined by F. Soddy, from iso- ‘equal’ + Greek topos ‘place’ (because the isotopes occupy the same place in the periodic table of elements).

词汇	isotope
释义	Definition of isotope in English: isotope noun ˈʌɪsətəʊpˈaɪsəˌtoʊp Chemistry Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. 〔化〕同位素 some elements have only one stable isotope radioactive isotopes of caesium, strontium, and plutonium Example sentencesExamples Beta radiation is the emission of an electron from the nucleus of a radioactive isotope. Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues. Radioactive elements have different isotopes that decay at different rates. When uranium is bombarded with neutrons, the two isotopes have differing nuclear reactions. The nuclei of the hydrogen isotopes are the proton, the deuteron, and the triton. Derivatives isotopic adjective ʌɪsəˈtɒpɪkˌaɪsəˈtɑpɪk Chemistry This points to a minor influence of diagenetic carbonate on the isotopic signal. Example sentencesExamples Radiocarbon dating relies on the fact that carbon exists naturally in several isotopic forms. Ecologists see these isotopic ratios of carbon, hydrogen, oxygen, and nitrogen as signatures. Based on changes in isotopic composition, individual amino acids could be roughly divided into three groups. During subsequent logging, samples of core were selected for sectioning and for geochemical, mineralogical and isotopic analysis. isotopically adverb ʌɪsəˈtɒpɪk(ə)li Chemistry Likewise, isotopically substituted lipid membranes can be differentiated from protein adlayers and even each other with the proper selection of unique isotopic labels. Example sentencesExamples During interglacial periods the ice caps melt and return the isotopically light water to the oceans, where it mixes rapidly. Consequently, white mica populations and even individual grains may represent compositionally and isotopically heterogeneous systems. With its origin in the local electron distribution, the chemical shift is a sensitive reporter of the chemical environment of isotopically labeled atoms. Winter and summer laminae differences are significant and are isotopically depleted with respect to water column organic carbon. isotopy noun ʌɪˈsɒtəpi Chemistry It is an excellent piece of work which considers loop and quasigroup identities that are invariant under isotopy, proving a number of very interesting results. Origin 1913: coined by F. Soddy, from iso- 'equal' + Greek topos 'place' (because the isotopes occupy the same place in the periodic table of elements). Rhymes radioisotope Definition of isotope in US English: isotope nounˈīsəˌtōpˈaɪsəˌtoʊp Chemistry Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. 〔化〕同位素 some elements have only one stable isotope radioactive isotopes of cesium, strontium, and plutonium Example sentencesExamples The nuclei of the hydrogen isotopes are the proton, the deuteron, and the triton. Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues. Beta radiation is the emission of an electron from the nucleus of a radioactive isotope. Radioactive elements have different isotopes that decay at different rates. When uranium is bombarded with neutrons, the two isotopes have differing nuclear reactions. Origin 1913: coined by F. Soddy, from iso- ‘equal’ + Greek topos ‘place’ (because the isotopes occupy the same place in the periodic table of elements).
随便看	DUP dup dupable dupable dupatta dupe duped duper duper duperies dupery dupery dupes duping dupion dupioni duple duplet duplex duplexer duplexes duplexing duplexity duplexity duplex querela