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"Z"-number | |||
charge number; Z number | |||
proton number; atomic number | |||
ordination number | |||
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atomic number | |||
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atomic number |
原子序数: 18 phrases in 10 subjects |
Chemistry | 2 |
Earth sciences | 1 |
Electronics | 2 |
General | 1 |
Metallurgy | 6 |
Nuclear physics | 1 |
Oil / petroleum | 1 |
Polymers | 1 |
Space | 2 |
Technology | 1 |