mass number
复数形式
mass numbers
1
质量数, 核子数
the total number of protons and neutrons in the nucleus of an atom
- The mass number of carbon-12 is 12, as it has 6 protons and 6 neutrons.
碳12的质量数是12，因为它有6个质子和6个中子。
- 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。
- Helium-4 has a mass number of 4, comprising 2 protons and 2 neutrons in its nucleus.
氦-4的质量数为4，其原子核包含2个质子和2个中子。
- The mass number of oxygen-16 is 16, with 8 protons and 8 neutrons.
氧-16的质量数是16，有8个质子和8个中子。
- When determining the mass number of an isotope, add the number of protons and neutrons together.
在确定同位素的质量数时，将质子和中子的数量相加。
同义词：