Name ________________ Properties of Ionic and Metallic Substances 1. A hard substance that has a high melting point and is a poor conductor of electricity in the solid phase could be 1) CO 2 2) Mg 3) NaCl 4) CCl4 2. A characteristic of ionic solids is that they 1) 2) 3) 4) 5. Metallic bonding occurs between atoms of 1) sulfur 2) copper 3) fluorine 4) carbon 6. Which element has a crystalline lattice composed of positive ions through which electrons flow freely? have high melting points have low boiling points conduct electricity are non-crystalline 1) bromine 2) calcium 3. A solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely 1) ionic, because the valence electrons are shared between atoms 2) ionic, because the valence electrons are mobile 3) metallic, because the valence electrons are stationary 4) metallic, because the valence electrons are mobile 4. The high electrical conductivity of metals is primarily due to 1) 2) 3) 4) Date:_________________ 3) carbon 4) sulfur 7. Which type of bonding involves positive ions immersed in a sea of mobile electrons? 1) ionic 2) nonpolar covalent 3) polar covalent 4) metallic 8. Which substance is a good conductor of electricity in both the solid and liquid phases? 1) 2) 3) 4) high ionization energies filled energy levels mobile electrons high electronegativities Chemistry! a metallic substance an ionic substance a network substance a molecular substance Answer Key Properties of Metallic and Ionic Substances 1. 3 2. 1 3. 4 4. 3 5. 2 6. 2 7. 4 8. 1 Chemistry!