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

英語での「mass number」の定義と意味

Mass number
01

質量数, 核子数

the total number of protons and neutrons in the nucleus of an atom
example
例
The mass number of carbon-12 is 12, as it has 6 protons and 6 neutrons.
炭素12の質量数は12です。それは6つの陽子と6つの中性子を持っているからです。
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