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mass number
mass
ˈmæs
mās
num
nʌm
nam
ber
bər
bēr
British pronunciation
/mˈas nˈʌmbə/

“mass number”的英语定义和含义

Mass number
01

质量数, 核子数

the total number of protons and neutrons in the nucleus of an atom
example
例子
Uranium-238 has a mass number of 238, indicating it has 92 protons and 146 neutrons.
铀238的质量数为238，表明它有92个质子和146个中子。
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