1. COLEGIO SAN PATRICIO<br />CHEMISTRY 9th<br />REVIEW – THIRD PERIOD<br />Name _____________________________________________________ List Number ________<br />9th _______<br />Answer the following:<br />What does the atomic number indicate about an element? __________________<br />What is the atomic number? _____________________________<br />Which are the subatomic particles? What is their charge? ____________________<br />How does an atom become an ion? ______________________________<br />Which elements lose electrons? What type of ions do they form? ______________________________<br />Which elements gain electrons? What type of ions do they form? ______________________________<br />Ionic compounds are formed between ___________________________________<br />Covalent compounds are formed between ________________________________<br />In ionic bonds, atoms transfer ______________, and it is the electrostatic attraction between ________________ and _______________ ions.<br />In covalent bonds, atoms ___________________ electrons.<br />Covalent bonds can be: ___________________- when electrons are shared equally, or __________________ - when electrons are shared unequally.<br />What are valence electrons? ___________________________________________<br />How many valence electrons do elements in group 1 have?____________<br />How many valence electrons do elements in group 2 have?____________<br />How many valence electrons do elements in group 13 have?____________<br />How many valence electrons do elements in group 14 have?____________<br />How many valence electrons do elements in group 15 have?____________<br />How many valence electrons do elements in group 16 have?____________<br />How many valence electrons do elements in group 17 have?____________<br />How many valence electrons do elements in group 18 have?____________<br />Match the columns, writing the correct letter next to the number, some letters may be used more than once.<br />Elements located at the far right of the periodic tablea. atomic number<br />Elements located at the far left of the periodic tableb. alkali metals<br />Mendeleev Periodic Table was arranged by…c. periods<br />Modern Periodic Table is arranged by…d. atomic mass <br />The columns of the periodic table are called…e. noble gases<br />The rows of the periodic table are called…f. nonmetals<br />Subatomic particles involved in chemical bondingg. alkaline earth<br />The most reactive metals. They have to be stored in oilh. transition metals<br />Nonmetals that react very easily and form saltsi. density<br />Elements in group 16(name of family)j. groups<br />Elements that do not form compounds, non-reactivek. atomic size<br />Good conductors of electricityl. chalcogens<br />Poor conductors of electricitym. metals<br />Indicates the number of protons and electrons in an atomn. halogens<br />Least reactive of all metalso. protons<br />Form ions with +3 chargep. neutrons<br />Form ions with +1 chargeq. electrons<br />Elements in group 2 (name of family)r. group 13<br />s. group 15<br />t. group 16<br />Write if the element has to lose or gain electrons to form an ion, and the symbol of the ion: <br />1. Calciumloses 2 electrons Ca2+(example)<br />2. Iodine_____________ ________<br />3. Aluminum_____________ ________<br />4. Sulfur_____________ ________<br />6. Nitrogen_____________ ________<br />7. Barium_____________ ________<br />8. Fluorine_____________ ________<br />9. Bromine_____________ ________<br />10. Lithium_____________ ________<br />Write the Lewis Structure (Electron-Dot) for the following elements and compounds:<br />Xenon6. Aluminum<br />Nitrogen7. Carbon<br />Helium8. Potassium<br />Magnesium9. Beryllium<br />Oxygen10. Nitrogen<br />11. CCl414. AlBr3<br />12. NaCl15.CF2H2<br />13. NH3<br />The following names have mistakes, identify the mistake and correct it.<br />CO2monocarbon dioxide__________________________________<br />SO2sulphur dioxygen__________________________________<br />NaClchloride sodium__________________________________<br />K2Sdipotassium sulphide__________________________________<br />PCl3Potassium trichloride__________________________________<br />The following formulas have mistakes, identify the mistake and correct it.<br />Li2FLithium fluoride__________________________________<br />Al302Aluminum oxide__________________________________<br />ClO6Dichlorine octoxide__________________________________<br />C4BrCarbon tetrabromide__________________________________<br />O2F2Oxygen difluoride__________________________________<br />Indicate the number of atoms of each element:<br />Ba(NO3)2 __________________________________<br />Al2(CrO7)3__________________________________<br />Al2O3__________________________________<br />