1] It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state,[2] and has a value of 1.660538921(73)×10−27 kg.[3]The CIPM has categorised it as a non-SI unit accepted for use with the SI, and whose value ...
atomic mass unit 美 英 un.原子质量单位;核质量单位 英汉 英英 un. 1. 原子质量单位 2. 核质量单位
unified atomic mass unit 英 [ˈjuːnɪfaɪd əˈtɒmɪk mæs ˈjuːnɪt] 美 [ˈjuːnɪfaɪd əˈtɑːmɪk mæs ˈjuːnɪt]网络 &#...
atomic mass unit n (Units) a unit of mass used to express atomic and molecular weights that is equal to one twelfth of the mass of an atom of carbon-12. It is equivalent to 1.66 × 10–27kg. Abbreviation:amuAlso called:unified atomic mass unitordalton ...
AMU, it roughly reflects the sum of the number of protons and neutrons in the atomic nucleus (electrons have so much less mass that they are assumed to have a negligible effect). The symbol for the unit is u (unified atomic mass unit) or Da (Dalton), although AMU may still be used....
(http://physics.nist.gov/cgi-bin/cuu/Value?tukg) 4. ^ a b c Petley, B. W., "The atomic mass unit", IEEE Trans. Instrum. Meas. 38 (2): 175–79, doi:10.1109/19.192268 (https://dx.doi/10.1109%2F19.192268) 15-1-27 Atomic mass unit - Wikipedia, the free encyclopedia ...
Atomic mass unitA unit of mass equal to exactly 112 of the mass of an atom of carbon-12 (12C), the predominant isoto…Weil, Jonathan F
The calculator will warn you if you enter a value larger than 177, as this is the highest number of neutrons observed in an atom so far. The calculator then displays the atomic mass in the default unit of atomic mass units. You can change the units by clicking on the unit. It also ...
1 amu ( atomic mass unit ) mass is equal to energy of 03:26 To measure the resistance of a galvanometer by half deflection method,... 01:25 Cadmium and Broron rods are used in a nuclear reactor to 00:52 Calculate the number of photons emitted per second by a 10 watt sodium... ...
The universal mass unit, abbreviated u (sometimes amu for atomic mass unit), is defined as one-twelfth of the mass of the 12C atom which has been defined to be exactly 12 u. The absolute mass of a 12C atom is obtained by dividing the value 12 by the Avogadro number (NA = 6.022 137...