Bonding Test Do Not Write on This Test!!! You may use a periodic table. Multiple Choice-Identify the choice that best completes the statement or answers the question. 1) Electrons involved in bonding between atoms are a. valence electrons b. inside the nucleus c. closest to the nucleus d. positively charged 2) Each family in the periodic table has its own characteristic properties based on the number of a. neutrons b. valence electrons c. protons d. ions 3) What is the greatest number of valence electrons an atom can have? With the exception of helium. a. 2 b. 3 c. 8 d. 12 4) If atoms of a halogen nonmetal (Group 17) gains one electron, the atoms then have a. no valence electrons b. 7 valence electrons c. 8 valence electrons d. 17 valence electrons 5) When an atom loses an electron, it becomes a a. positive ion b. negative ion c. neutral ion d. neutral atom 6) An ionic bond is the attraction between a. similarly charged ions c. neutral ions b. oppositely charged ions d. neutral atoms 7) The element boron is directly above aluminum on the periodic table. Which statement about boron is true? a. Boron is in the same period as aluminum b. Boron is in the same group as aluminum and has 5 valence electrons c. Boron has 5 valence electrons and is in the same period as aluminum d. Boron is in the same group as aluminum and has 3 valence electrons 8) Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the “2” tell you? a. Bromide has a 2 charge. b. There are two magnesium ions to every bromide ion. c. There are two bromide ions for every magnesium ion. d. Bromide has a 2+ charge. 9) What is the chemical name for the compound with the formula Na2S? a. sodium fluoride b. magnesium sulfide c. lithium oxide d. sodium sulfide 10) In the chemical formula for an ionic compound, which item is written first? a. positive ion b. negative ion c. subscript d. charge 11) Which of the following is a characteristic property of ionic compounds? a. They have low melting points. b. They have low boiling points. c. They form hard, brittle crystals with characteristic shapes. d. They contain no charged particles. 12) In what form can an ionic compound conduct electricity? a. as a solid b. when dissolved in water c. as a crystal d. when warmed slightly 13) A chemical bond formed when two atoms share electrons is called a(n) a. ionic bond b. covalent bond c. polyatomic bond d. crystal bond 14) What is a double bond? a. a bond between two atoms b. one pair of electrons shared between two atoms c. two pairs of electrons shared between two atoms d. two pairs of electrons shared between four atoms 15) Which is a property shared by most covalent compounds? a. high boiling point b. high melting point c. low melting point d. good conductor of heat and electricity 16) Covalent (molecular) compounds do not conduct electricity because they a. break up into ions. b. do not break up into ions. c. do not dissolve in water. d. have high melting points. 17) If you found a carbon-13 atom, you would know that a. it has 13 protons b. it has 13 electrons c. it has 13 neutrons d. it has 7 neutrons 18) The attraction between a positive metal ion and the electrons surrounding it is a(n) a. chemical bond b. covalent bond c. ionic bond d. metallic bond 19) Which of the following terms means that metals can be hammered or pounded into thin sheets, as in aluminum foil, or beaten into complex shapes? a. polar b. alloy c. ductile d. malleable 20) Which of the following terms means that metals can be pulled into thin strands or wires? a. polar b. alloy c. ductile d. malleable True/False: Indicate whether the statement is true (A) or false (B). 21) The valence electrons are those electrons closest to the nucleus. 22) Each family in the periodic table has its own characteristic properties based upon its number of valence electrons. 23) When an atom gains an electron it becomes a positive ion. 24) The attraction between a positive ion and a negative ion results in a covalent bond. 25) Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of ionic compounds. 26) When electrons are transferred between two atoms, a covalent bond is formed. 27) When a double bond is formed two electrons are shared. Completion: Complete each statement by matching the word with the statement. A. valence 28) 29) 30) 31) B. positive C. equal D. most E. negative Elements in Group 17 (the halogens) are the _____________ reactive nonmetals. Elements in Group 1 lose one electron to form ions with a(n) __________ charge. An element is stable when it has a full ______ shell. When an ionic compound forms, the total number of positive charges and the total number of negative charges must be____________. Use the diagram to answer the next set of questions. 32) The group containing the most reactive nonmetals A. 1 B. 2 C. 13 D. 17 E. 18 33) In each period, how does the number of electrons in each kind of atom change from left to right between Groups 1 and 2? A. remains the same B. increases by 1 C. increases by 2 D. decreases by 1 E. decrease by 2 34) In an electron dot diagram of aluminum (Al), how many dots should be drawn around the element’s symbol? A. 1 B. 2 C. 3 D. 4 E. 5 35) Which group of elements loses electrons most easily? A. 1 B. 2 C. 13 D. 17 E. 18 36) Which group contains elements with two valence electrons? A. 1 B. 2 C. 13 D. 17 E. 18 37) How many atoms of a Group 17 element would be needed to react with one atom of a Group 2 element? A. 1 B. 2 C. 3 D. 4 E. 5 Use the table below to answer the following questions. Name Lithium ____?___ Calcium Chloride Ions and Their Charges Charge Symbol or Formula _?_ Li+ 1+ Na+ 2+ ___?__ 1– ___?__ ___?____ Carbonate 1– 2– NO3 ___?___ 38) What is the charge for a lithium ion? A. 3+ B. 1C. 2+ D.1+ 39) What is the symbol for a calcium ion? A. Ca 2+ B. Ca 1+ C. Ca 2- D. Ca 3+ 40) What is the chemical formula of the compound that forms when sodium and chloride combine? A. SCl B. SC C. NaCl D. NaC