11) Choose the compound below that should have the lowest melting point according to the ionic bonding model. A) LiF B) NaCl C) CsI D) KCl E) RbI 12) Identify the compound with ionic bonding. A) NaF B) K C) H2O D) He E) S 13) Identify the compound with covalent bonding. A) NaCl B) K C) H2O D) He E) S 14) Identify the compound with metallic bonding. A) NaI B) K C) H2O D) He E) S 15) Identify the substance that conducts electricity. A) NaCl dissolved in water B) solid NaCl C) ethanol D) solid baking soda E) sugar dissolved in water. 16) Use Lewis theory to determine the chemical formula for the compound formed between Mg and N. A) MgN B) Mg3N2 C) MgN2 D) Mg2N E) Mg2N3 17) Use Lewis theory to determine the chemical formula for the compound formed between Rb and O. A) RbO B) RbO2 C) Rb2O D) Rb2O3 E) Rb3O2 18) Use Lewis theory to determine the chemical formula for the compound formed between Ca and I. A) CaI B) Ca2I3 C) Ca3I2 D) CaI2 E) Ca2I 19) Use Lewis theory to determine the chemical formula for the compound formed between Al and F. A) Al3F2 B) Al2F3 C) AlF2 D) AlF E) AlF3 20) Use Lewis theory to determine the chemical formula for the compound formed between Na and Br. A) NaBr2 B) Na 2Br C) Na Br D