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Description | The definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements. |
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| 主办 | 类型 | 类 | TTL | 目标 |
| periodictable.com | HINFO | IN | 21599 | |
| periodictable.com | NS | IN | 21599 | wri-dns1.wolfram.com |
| periodictable.com | NS | IN | 21599 | wri-dns0.wolfram.com |
| periodictable.com | A | IN | 21599 | |
| periodictable.com | MX | IN | 21599 | mx2.wolfram.com |
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| periodictable.com | SOA | IN | 21599 |