Unit 3 Mini-Test 1

Unit 3 Test- All types of Bonding, Naming & Writing Formulas, Properties & Changes

Ionic Bonding: Be able to recognize if an ionic bond would form. Be able to write the formula unit for an ionic compound and name it properly. Understand the basic properties of an ionic bond and be able to explain why metals conduct electricity. Know the differences between a binary and ternary bond.

Covalent Bonding: Be able to recognize if a covalent bond would form. Understand how to show the bonding with dot formulas, structural formulas and orbital formulas. Be able to write the molecule formed and name it correctly. Understand the basic properties of covalent bonds including polarity.

Physical and Chemical Properties and Changes:  Know how to tell if a property is physical or chemical (can you observe it without changing it?). Understand why we need to know these properties.  Know how to determine if a change is chemical and physical and what indications to look for when determining this (Is it reversible? Did the properties change?) Practice Problems

1. Why do elements chemically bond? 2. Explain how valence electrons behave in an ionic & covalent bond. 3. Explain the octet rule. 4. Before naming ionic formulas, why should you check to see if the formula contains a metal in the “d” block?

5. Name the following: KCl BaCrO4 P2O6 CuF

S2Cl5 Na3N KClO4 NaO

6. Write the formula for the following: lithium acetate zinc(II) nitride selenium tribromide sodium phosphide

ammonium oxalate calcium permanganate dinitrogen trioxide lead(IV) iodide

7. For the following, identify mistakes and correct the name OR formula as necessary. If there is no mistake, write the word correct.

CaCl=calcium chloride AlP=aluminum phosphide

C2F4=tetracarbon difluoride Mg2O2=magnesium oxide

RbNO3=rubidium dioxide NO2=mononitrogen dioxide

MgS=magnesium sulfide Cu2Br=copper(II) bromide

8. How many bonds would the following molecules have?

N2 F2 O2 9. What is the difference between Polar and Nonpolar covalent bonds?

10. What are the 5 ways to identify if a chemical change (reaction) has occurred?

11. Is a hot dog being cooked a chemical or physical change? Why?

12. Is salt (NaCl) being dissolved in water a chemical or physical change? Why?

13. Is water is boiled in preparation for making pasta a chemical or physical change? Why?

14. Name 3 properties of the following: Ionic Bonds Covalent Bonds Acids Bases

15. Acid Mono-, di-, or Binary or Ternary Name triprotic HCl

HClO3 HI

16. Acid Binary or Ternary Formula Mono-, di-, or triprotic Acetic Acid Sulfurous Acid Hydrobromic Acid Phosphoric Acid Hydronitric Acid Oxalic Acid Hydroselenic Acid