Rubidium iodide is an ionic compound.
Which row describes what happens to the rubidium and iodine atoms when they form ions?
1 )
rubidium atoms: gain one electron / iodine atoms: gain one electron
2 )
rubidium atoms: gain one electron / iodine atoms: lose one electron
rubidium atoms: lose one electron / iodine atoms: gain one electron
4 )
rubidium atoms: lose one electron / iodine atoms: lose one electron
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