[Science Wednesday] T3W1 Properties of Ionic Compounds

Explain why ionic compounds do not conduct electricity in their crystalline form.

Why do metals and nonmetals usually form ionic compounds, whereas two bonded nonmetals are never ionic? Explain.

Why do ionic compounds tend to be hard?

Ionic bonds are created between a metal and a non-metal while covalent bonds are created between two (a)   .

Metals tend to __________ electrons and nonmetals tend to __________ electrons.

• gain, gain

• lose, lose

• lose, gain

• gain, gain

• neither, they keep their electrons

Anions tend to have a __________ charge and cations tend to have a __________ charge.

• positive, positive

• negative, negative

• positive, negative

• negative, positive

• neither, they are both neutral

Anions tend to be __________ and cations tend to be __________.

• metals, metals

• nonmetals, nonmetals

• metals, nonmetals

• nonmetals, metals

• metalloids, metalloids

Which species below is the nitride ion?

• $NO_3^-$

• $Na^+$

• $NO_2^-$

• $N^{3-}$

• $NH_4^+$

When a metal and a nonmetal react, the __________ tends to lose electrons and the __________ tends to gain electrons.

• metal, metal

• nonmetal, nonmetal

• metal, nonmetal

• nonmetal, metal

• None of the above, these elements share electrons.

__________ typically form ions with a 2+ charge.

• Alkaline earth metals

• Halogens

• Chalcogens

• Alkali metals

• Transition metals