Plastics have a low melting point because: the bonding within the molecule is se

Question

Plastics have a low melting point because: the bonding within the molecule is secondary they have ionic bonds which disassociate when heated. They contain highly electronnegative elements they contain highly electronpositve elements the bonding between molecules is secondary Mg_2Pb is a ceramic. True False Hello in your kitchen behaves like a thermoset. True False Al_2O_3 is a ceramic True False A ceramic is a: compound between two electronegative elements in which there are ionic bonds compound between a metallic and an electropositive element in which the bonding is ionic compound between a metallic and a non-metallic element in which the bonding is at least partially ionic. compound between two metallic elements in which there are covalent bonds compound between a metallic and non-metallic element in which there are only permanent dipoles A thermoplastic is a material that: can be melted and shaped ONLY once melts upon heating and solidfies upon cool

Explanation / Answer

1. Plastics have low melting melting point because Option 5 the bonding between the molecules is secondary.

Plastics have covalent bonds.

2. Mg2Pb is ceramic. TRUE.

3. Al2O3 is a ceramic. TRUE.

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