Item:Q13413: Difference between revisions
Created a new Item: isotope, nuclides having the same atomic number but different mass numbers |
Created claim: instance of (P2): second-order class (Q23) |
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| Property / instance of | |||
| Property / instance of: second-order class / rank | |||
Normal rank | |||
| Property / instance of: second-order class / qualifier | |||