(D) ionic bonds. 11. (3 Pts) In which pair do both compounds exhibit predominantly ionic bonding? (B) NaF and MgO (C) KNO3 and CH4 (D) KCl and CO2 (A) SO2 and HCI 12. (3 Pts) What forces hold the elements together in an ionic compound? First Period Second Period Third Period XYZ P W 13. (3 Pts) Which is most likely to be formed by electron transfer and be ionic? Main Groups VVVVIO QSU RTM (A) a compound of U and S (B) a compound of P and S (C) a compound of Z and P (D) a compound of Y and T (E) a compound of Q and T 14. (3 Pts) What is the explanation for the fact that the bonding in Snl is more covalent than the bonding in SnF4? 15. (3 Pts) Which characteristic is generally true of nonmetallic oxides? (A) They are in general ionic compounds. (B) They are in general covalent compounds. (C) They react with water to form bases. (D) They cannot be prepared directly from the elements. (E) They react with acids to form a salt and water. 16. (4 Pts) Use structural formulas to show how hydrogen bonding occurs in liquid methanol, CH,OH. (Use at least 2 molecules