Chemical Bonding Test

1.  The number of valence electrons in a fluorine atom is

2.  Which of the following atoms is believed to contain three lone pairs of electrons?

3.  Binary ionic compounds

4.  The empirical formulas of ionic compounds are explained using

5. Multivalent metals

6.  The substance NH₃ is a very important industrial chemical. It is used directly as a fertilizer and is also used to produce many other useful chemicals. The IUPAC name of this substance

7. The IUPAC name for P₂I₄(s) is

8.  The correct formula for nitrous acid is

9.  The systematic IUPAC name for HBr(aq) is

10.  A student records the following evidence in a lab book.

11.  Which of the following chemical formulas represents a pure substance containing covalent bonds?

12. Which of the following formulas does NOT represent a molecular compound?

I.   CO_2(g)

II.  CoCl_2(s)

III.  SO_2(g)

IV.  PCl_5(g)

V.   HCl_(g)

13. An electron dot diagram (Lewis structure) for a nitrogen atom should show

14.  The concept of multiple covalent bonds is used to explain the molecular formula of:

I.    O₂

II.   NaCl

III.  C₂H₆

IV.  F₂

V.   NaOH

15. The IUPAC name for Na₂CO₃(s) is

16.  The IUPAC name for KMnO_4(s) is

17.  The IUPAC name for Fe₂O_3(s) is

18.  The IUPAC name for AgNO_3(s) is

19.  What is the formula for copper(II) nitrite?

I.    Cu₂(NO₃)_(s)

II.   Cu(NO₃)_2(s)

III.  Cu(NO₂)_2(s)

IV.  Cu₂(NO₂)_(s)

V.   Cu(NO₃)_(s)

20.  Which of the following is the correct electron dot diagram for NaCl?

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21.  An example of a binary compound is

22.  Which one of the following formulas is incorrect?

I.    Cu₂O

II.   NaOH

III.  CO

IV.  Ba(HCO₃)₂

V.  ZnCl₃

23. In which of the following pairs of ions do both names end in “ate”?

I.   ClO₃^–, ClO₂^–

II.   NO₃^–, NO₂^–

III.   CO₃^2–, SO₃^–

IV.   CO₃^2–, SO₄^2–

V.    SO₃^2–, MnO₄^–

24.  What are the physical characteristics of ionic compounds?

25.  Provide both the classical name and the IUPAC name for the following acids.

26. If XF₂ is the correct formula for a metallic fluoride, what is then the formula for the oxide of X? Show your reasoning and use charged ions (cations and anions) as well as the criss-cross method in your narration.

27.  For a science fair project, a student wants to design a simple device for removing certain gases from polluted air. He knows that polar molecules dissolve well in water, so he bubbles polluted air through a jug of water to remove unwanted gases. For his project, the student uses air containing the following gases:  (Hint draw electron dot diagrams and check the share of valence electrons)

List the gases that will dissolve by writing down the numbers __________________________