atomic-number

Science Dictionary
atomic number  
The number of protons in the nucleus of an atom. In electrically neutral atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus. The atomic number of an element determines its position in the periodic table, and is usually denoted by the letter Z and written as a subscript before an element's symbol, as in 92U.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Explore Dictionary.com
Previous Definition: atomic-mass
Next Definition: atomic-orbital
Words Near: atomic-number
More from Thesaurus.com
Synonyms and Antonyms for atomic-number
More from Reference.com
Search for articles containing atomic-number
More from Dictionary.com Translator
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;