mass number
mass number — 名詞
1. the number you get by adding together all the protons and all the neutrons in a
質量數
原子核中質子與中子的總數
the number you get by adding together all the protons and all the neutrons in a single atom's centre — this whole number identifies which isotope of an element you have
Shirin's chemistry teacher asked the class to calculate the mass number of carbon-14.
Shirin 的化學老師要求全班計算碳-14 的質量數。
mass number of [element-isotope]
Léa wrote down that oxygen-16 has a mass number of sixteen.
Léa 寫下氧-16 的質量數是十六。
has a mass number of [number]
Bao checked the periodic table but could not find the mass number listed anywhere.
Bao 查看了週期表，但到處都找不到質量數的標示。
The mass number of uranium-235 is two hundred and thirty-five, Faisal explained.
Faisal 解釋說，鈾-235 的質量數是兩百三十五。
the mass number of [element] is [number]
Gabriel remembered that the mass number equals protons plus neutrons in the nucleus.
Gabriel 記得質量數等於原子核中的質子數加中子數。
mass number equals [formula]
- calculate the mass number
- mass number of [element]
- mass number equals
- nucleon number
more formal and used mainly in physics contexts
文法句型
mass number of + [element/isotope]
用法筆記
A technical term in chemistry and physics. Do not confuse with atomic weight, which averages the mass numbers across all naturally occurring isotopes of an element.
常見錯誤
同根字
- atomic number名詞B2
- atomic mass名詞C1
- mass名詞A2
常見搭配
常用片語
- calculate the mass number
- determine the mass number
介系詞搭配
- mass number of