SolidsUnit Cell41Choose the best answerThe smallest repeating structural unit of a crystal lattice is called the:ACrystal systemBLattice energyCUnit cellDCleavage plane Like 0 Discuss 0Share
SolidsMolecular Solids42Choose the best answerWhich type of crystalline solid is generally soft and has a relatively low melting point?AIonic solidBCovalent-network solidCMolecular solidDMetallic solid Like 0 Discuss 0Share
SolidsCovalent-Network Solids43Choose the best answerSolids in which atoms are connected throughout the crystal by covalent bonds are called:AIonic crystalsBCovalent-network crystalsCMetallic crystalsDMolecular crystals Like 0 Discuss 0Share
SolidsLattice Energy44Choose the best answerIf lattice energy is defined as lattice dissociation enthalpy, a positive lattice-energy value represents:AEnergy released when the lattice formsBEnergy required to separate the ionic crystal into gaseous ionsCEnergy needed to melt the solid onlyDZero energy change Like 0 Discuss 0Share
SolidsPolymorphism45Choose the best answerCalcite and aragonite are different crystalline forms of CaCO₃. This is an example of:APolymorphismBIsomorphismCAnisotropyDTransition only Like 0 Discuss 0Share