What is the name of the following ion compund.
SrO
Cr1I2
Strontium oxide; chronium(II)iodide
Thanks a tonz !
To determine the name of an ion compound like SrO or Cr1I2, we need to understand the naming rules for these types of compounds.
For SrO:
1. Identify the cation and anion in the compound. In this case, Sr is the cation (strontium) and O is the anion (oxygen).
2. Write the name of the cation first, followed by the name of the anion.
Since Sr is a Group 2 element, its cation name will not change. Therefore, the name of SrO is "strontium oxide."
For Cr1I2:
1. Determine the charges of the cation and the anion. In this case, Cr is the cation (chromium) and I is the anion (iodine). The subscript '1' indicates that there is only one Cr ion, while the subscript '2' indicates that there are two I ions.
2. Use the crisscross method to determine the proper subscripts. In this case, the charges on the cation and anion are not directly given. However, by considering the fact that I (iodine) is a Group 17 element with a charge of -1, and the overall compound has no net charge, we can determine that Cr (chromium) must have a charge of +2.
3. Write the name of the cation, followed by a Roman numeral in parentheses to represent the charge, then the name of the anion with the appropriate subscript.
Since Cr has a charge of +2, the name of the compound is "chromium(II) iodide."
Remember to always check for Roman numerals in the compound's name to determine the charge on the cation.