Chemistry Unit 5 Review - Fall 2021 PDF

Chemistry Name __________________________________ Unit 5: Chemical Bonding Unit Review Define each of the following terms as they are used in the context of chemical bonding. (You can use the online textbook, Chapter 6 – log on through my.hrw.com) 1. chemical bond 2. ionic bondi...

Chemistry Name __________________________________ Unit 5: Chemical Bonding Unit Review Define each of the following terms as they are used in the context of chemical bonding. (You can use the online textbook, Chapter 6 – log on through my.hrw.com) 1. chemical bond 2. ionic bonding 3. covalent bonding 4. molecule 5. chemical formula 6. electron-dot notation 7. formula unit Answer each of the following questions: 8. Which part of the atom is responsible for chemical bonding? 9. How many valence electrons do most atoms need to have a complete outer shell? 10. If an element gives away an electron, will it form a positive ion or a negative ion? Why? 11. If an element gains an electron, will it form a positive ion or a negative ion? Why? 12. Complete the following chart. Family (Group) Number or Number of valence electrons Name Halogens Alkali metals Alkaline earth metals Noble (Inert) Gases Group 13 Group 14 Group 15 Group 16 Group 17 13. Bond Properties: Complete the chart below with characteristics of ionic and covalent bonds and compounds. Covalent compound Ionic compound Description of bond (sharing of electrons or transfer of electrons) Solubility in water (yes, no, sometimes) Melting point (high, low Conductivity when solid Conductivity when liquid Conductivity when dissolved in water 14. Complete the table below for each compound Chemical Identify each Ionic or covalent Lewis Dot structure formula element as metal or compound If IONIC, Write the ions with charges so nonmetal that it is neutral If COVALENT, draw the Lewis Dot Structure of the compound CaF2 Ca – metal ionic F – nonmetal NO2 N – nonmetal covalent O – nonmetal CH4 H2O NaBr K2S MgO PBr3