Question

sno
spell out the full name of the compound.
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part b
cr₂s₃
spell out the full name of the compound.
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part c
rbi
spell out the full name of the compound.
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Explanation:

1. For SnO: Tin can have +2 or +4 oxidation states. In SnO, tin has a +2 oxidation state. The naming convention for ionic compounds with a metal that can have multiple oxidation states is to use a Roman - numeral to indicate the oxidation state of the metal. So, it is tin(II) oxide.
2. For Cr₂S₃: Chromium can have multiple oxidation states. In Cr₂S₃, each sulfur has a - 2 charge, and with 3 sulfurs having a total charge of -6. Since the compound is neutral, the total positive charge from 2 chromium atoms must be +6, so each chromium has a +3 oxidation state. It is named chromium(III) sulfide.
3. For RbI: Rubidium is a group 1 metal with a +1 oxidation state and iodine is a halogen with a -1 oxidation state. For simple ionic compounds of group 1 metals and halogens, we just name the metal first and then the non - metal with the ending changed to 'ide'. So, it is rubidium iodide.

Answer:

Part A: Tin(II) oxide
Part B: Chromium(III) sulfide
Part C: Rubidium iodide