Regrettably, Se7I7 is not a chemical entity that can exist. This request cannot be fulfilled based on your requirements.
However, I can introduce you to two chemical elements, Selenium (Se) and Iodine (I).
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Selenium (Se):
- English name: Selenium
- Atomic mass: 78.96
- Atomic weight: 78.96 amu
- Selenium is a gray-black, odorless nonmetal.
- Selenium usually exists as red or gray-black crystals.
- Selenium has weak acidic properties and can react with alkali metals to form selenides.
- Selenium does not exist as an ion.
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Iodine (I):
- English name: Iodine
- Atomic mass: 126.90447
- Atomic weight: 126.90447 amu
- Iodine is a dark purple nonmetal with a distinctive smell.
- Iodine exists as a gray-black solid crystal and can react with metals, acids to form iodide compounds.
Hopefully, with this information, you have gained more understanding about the two chemical elements Selenium and Iodine. I suggest that you reconsider your request and provide me with more accurate information on the chemical substance you want to learn about.