mass number

Also found in: Medical, Legal, Acronyms, Encyclopedia, Wikipedia

0.01 sec.

mass number

The sum of the number of neutrons and protons in an atomic nucleus. Also called nucleon number.

mass number

(Physics / Atomic Physics) the total number of neutrons and protons in the nucleus of a particular atom. Symbol A Also called nucleon number

mass number

The total number of protons and neutrons in the nucleus of an atom. For example, nitrogen has 7 protons and 7 neutrons in its nucleus, giving it a mass number of 14. Isotopes of elements are distinguished by their mass number; for example, carbon-12 and carbon-14 have mass numbers of 12 and 14 respectively. Also called nucleon number. Compare atomic mass atomic weight

ThesaurusLegend: Synonyms Related Words Antonyms

Noun

mass number - the sum of the number of neutrons and protons in an atomic nucleus

nucleon number

mass unit - a unit of measurement for mass

Translations

mass number n (Phys) → numero di massa

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link

Feedback
Add definition

Mentioned in	?		References in periodicals archive	?		Dictionary browser	?		Full browser	?
actinouranium atomic mass atomic weight bohrium cobalt 60 darmstadtium dubnium element 111 element 112 element 113 element 114 element 115 gamma decay hassium ionium mass unit meitnerium nucleon number nuclide			There is no doubt that our current economy is a little scary to say the least Companies are laying off in mass numbers while gas, food, and energy costs are reaching record highs There is no doubt that our current economy is a little scary to say the least. Developing the Right Resume and Attitude for An Uncertain Economy by Heather Eagar / Jobs and Careers community It's been said that to get noticed on MySpace you need to really promote your music and have a mass number of fans to back you or your band If recording companies and other music related parties see that you are very popular this will definitely improve your chances of making a profitable career with your music It's been said that to get noticed on MySpace you need to really promote your music and have a mass number of fans to back you or your band. Increase Myspace MP3 Plays Service Review by John Stricken / Advertising, marketing, public relations community They predict a stronger deformation and even greater stability for a nucleus with atomic number 108 and mass number 270. Aiming for superheavy elements by Science News			Mass mass action Mass bell Mass book Mass card mass casualties mass casualty Mass center Mass copper mass culture mass defect mass deficiency mass education mass energy mass extinction mass hysteria mass in mass leave mass market mass media mass medium mass meeting mass murder mass murderer mass noun mass number mass observation mass production mass psychogenic illness mass rapid transit mass ratio mass sociogenic illness mass spectrograph mass spectrometer mass spectrometry mass spectroscope mass spectroscopic mass spectroscopy mass spectrum mass unit mass-action principle mass-energy mass-energy equivalence mass-market mass-produce mass-produced mass-spectrometric Mass. Massa Massachuset Massachusett			mass medication mass medication mass medium mass meeting mass meeting Mass Memory Control Subsystem Mass Memory Module Mass Memory Storage Device Mass Memory Superchip Mass Memory Unit Mass Miniature Radiography Mass moment of inertia Mass moment of inertia Mass moment of inertia Mass movement mass murder mass murder mass murder mass murder mass murderer mass murderer Mass murders Mass murders Mass Murders and Serial Killings Mass Murders and Serial Killings Mass Murders and Serial Killings Mass Murders and Serial Killings Mass Notification System mass noun mass nouns mass number mass numbers mass numbers mass numbers Mass Observation Mass observation surveys Mass observation surveys Mass observation surveys Mass of an electron Mass of an electron Mass of an electron Mass of Christian Burial Mass of electron Mass of electron Mass of electron Mass of Left Ventricle Myocardium Mass of Requiem Mass of Requiem Mass of sea squirts Mass of sea squirts Mass of the Chrism Mass of the Chrism Mass of the Earth Mass of the Earth Mass of the Earth Mass of the Lord's Supper Mass of the Lord's Supper Mass of the soul Mass of the soul Mass of the soul mass operator

Dictionary, Thesaurus, and Translations

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup

Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.