atomic number 1
| Noun | 1. |  atomic number 1 - a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe |
| 单词 | atomic number 1 | |||
| 释义 | atomic number 1
atomic mass unitatomic mass unitoramu,in chemistry and physics, unit defined as exactly 1-12 the mass of an atom of carbon-12, the isotopeisotope, in chemistry and physics, one of two or more atoms having the same atomic number but differing in atomic weight and mass number. The concept of isotope was introduced by F. ..... Click the link for more information. of carbon with six protons and six neutrons in its nucleus. One amu is equal to approximately 1.66 × 10−24 grams. Atomic mass unitAn arbitrarily defined unit in terms of which the masses of individual atoms are expressed. One atomic mass unit is defined as exactly of the mass of an atom of the nuclide 12C, the predominant isotope of carbon. The unit, also known as the dalton, is often abbreviated amu, and is designated by the symbol u. The relative atomic mass of a chemical element is the average mass of its atoms expressed in atomic mass units. atomic mass unit[ə′täm·ik ′mas ′yü·nət]atomic mass unitatomic number 1
Synonyms for atomic number 1
|
|||
| 随便看 |
|
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。