Formation of Ionic Compounds

The octet rule says that

• atoms become stable with 8 electrons in all their shells.

• atoms become stable with 8 electrons in their valence shell.

• atoms become stable with 8 electrons in all their 2nd shell.

• atoms become stable with a total of 8 electrons.

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Metals tend to 

• gain electrons
• lose electrons

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Nonmetals tend to 

• gain electrons
• lose electrons

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Elements in group 2 are likely to form ions with a charge of

• -2

• +2

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Elements in group 13 are likely to form ions with a charge of

• +13

• +3

• -3

• -13

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Carbon and silicon do not form ions.

• True

• False

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Two non-metal elements can form an ionic compound.

• True

• False

The reason that an electron is transferred from sodium to chlorine is that

• sodium is more electronegative than chlorine.

• sodium is less electronegative than chlorine.

• sodium and chlorine are equally electronegative but chlorine has a space for another electron.

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This picture indicates that

• Mg is in group 12 & O is in group 8.

• Mg is in group 2 & O is in group 16.

• Mg is in group 2 & O is in group 6.

• Mg is in group 12 & O is in group 16.

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This picture demonstrates that in forming ions both Mg and O achieve a stable octet of valence electrons.

• True

• False

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