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False


True


False


True


False


False


A metallic substance


Is always zero


it gives up electrons


They have low melting points


Polar covalent


a force that holds atoms that are oppositely charged


nonpolar covalent


ions are surrounded by ions of the opposite charge


The ionic compound has a high melting point


Sodium only


O2


PCl3


They are composed of anions and cations


To obtain noble-gas electron configuration


Cl2


Nitrogen


only when it is melted or dissolved in water


double covalent bond


They have mobile valence electorns


Al2O3


Ca3(PO4)2


HCl


Ca2+


oxygen


the one that is full
