[hah-nee-uh m] /ˈhɑ ni əm/

noun, Chemistry, Physics.
a proposed name for . Symbol: Ha.
[yoo-nil-pen-tee-uh m] /ˌyu nɪlˈpɛn ti əm/
noun, Chemistry, Physics.
a former name of . Symbol: Unp.
[doob-nee-uh m, duhb-] /ˈdub ni əm, ˈdʌb-/
noun, Chemistry, Physics.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105.
noun, Chemistry, Physics.
a name once advanced by the American Chemical Society for a transuranic element, artificially produced from californium, atomic no: 105; half-life of most stable isotope, 262Ha: 40 seconds Now called dubnium
a synthetic transactinide element produced in minute quantities by bombarding plutonium with high-energy neon ions. Symbol: Du; atomic no 105 See hahnium

hahnium hah·ni·um (hä’nē-əm)
Element 105.
Symbol Db
A synthetic, radioactive element that is produced from californium, americium, or berkelium. Its most long-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively. Atomic number 105. See Periodic Table.


Read Also:

  • Haida

    [hahy-duh] /ˈhaɪ də/ noun, plural Haidas (especially collectively) Haida for 1. 1. a member of an Indian people inhabiting the Queen Charlotte Islands in British Columbia and Prince of Wales Island in Alaska. 2. the language of the Haida people, part of the Na-Dene language group. /ˈhaɪdə/ noun 1. (pl) -das, -da. a member of […]

  • Haidarabad

    [hahy-der-uh-bahd, -bad, hahy-druh-] /ˈhaɪ dər əˌbɑd, -ˌbæd, ˈhaɪ drə-/ noun 1. . [hahy-der-uh-bahd, -bad, hahy-druh-] /ˈhaɪ dər əˌbɑd, -ˌbæd, ˈhaɪ drə-/ noun 1. a former state in S India, now part of Andhra Pradesh. 2. a city in and the capital of Andhra Pradesh, India, in the W part. 3. a city in SE Pakistan, […]

  • Haidar Ali

    [hahy-duh r ah-lee, ah-lee] /ˈhaɪ dər ˈɑ li, ɑˈli/ noun 1. 1722–82, Islamic prince and military leader of India: ruler of Mysore 1759–82. /ˈhaɪdər ˈɑːlɪ/ noun 1. a variant spelling of Hyder Ali

  • Haidinger-fringes

    [hahy-ding-er] /ˈhaɪ dɪŋ ər/ plural noun, Optics. 1. interference fringes produced by light passing through thick glass plates at near-normal incidence.

Disclaimer: Hahnium definition / meaning 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. All content on this website is for informational purposes only.