CHEMICAL BONDING

1) There are __________ paired and __________ unpaired electrons in the Lewis symbol for a phosphorus atom.

A) 4, 2

B) 2, 4

C) 2, 3

D) 4, 3

E) 0, 3 

 

2) In the Lewis symbol for a fluorine atom, there are __________ paired and __________ unpaired electrons.

A) 4, 2

B) 4,1

C) 2, 5

D) 6, 1

E) 0, 5 

 

3) The halogens, alkali metals, and alkaline earth metals have __________ valence electrons, respectively.

A) 7, 4, and 6

B) 1, 5, and 7

C) 8, 2, and 3

D) 7, 1, and 2

E) 2, 7, and 4 

4) The only noble gas without eight valence electrons is __________.

A) Ar

B) Ne

C) He

D) Kr

E) All noble gases have eight valence electrons.

5) Which of the following would have to lose two electrons in order to achieve a noble gas electron configuration?

             O        Sr        Na        Se        Br

A) O, Se

B) Sr

C) Na

D) Br

E) Sr, O, Se

6) Elements from opposite sides of the periodic table tend to form __________.

A) covalent compounds

B) ionic compounds

C) compounds that are gaseous at room temperature

D) homonuclear diatomic compounds

E) covalent compounds that are gaseous at room temperature

7) How many single covalent bonds must a silicon atom form to have a complete octet in its valence shell?

A) 3

B) 4

C) 1

D) 2

E) 0

8) What is the maximum number of double bonds that a hydrogen atom can form?

A) 0

B) 1

C) 2

D) 3

E) 4

9) The ability of an atom in a molecule to attract electrons is best quantified by the __________.

A) paramagnetism

B) diamagnetism

C) electronegativity

D) electron change-to-mass ratio

E) first ionization potential

10) Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

A) decreases, increases

B) increases, increases

C) increases, decreases

D) stays the same, increases

E) increases, stays the same

11) The type of compound that is most likely to contain a covalent bond is __________.

A) one that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table

B) a solid metal

C) one that is composed of only nonmetals

D) held together by the electrostatic forces between oppositely charged ions

E) There is no general rule to predict covalency in bonds.

12) Of the atoms below, __________ is the most electronegative.

A) Br

B) O

C) Cl

D) N

E) F

13) Of the atoms below, __________ is the least electronegative.

A) Rb

B) F

C) Si

D) Cl

E) Ca

14) Which of the following names is/are correct for the compound TiO2?

A) titanium dioxide and titanium (IV) oxide

B) titanium (IV) dioxide

C) titanium oxide

D) titanium oxide and titanium (IV) dioxide

E) titanium (II) oxide

15) The Lewis structure of N2H2 shows __________.

A) a nitrogen-nitrogen triple bond

B) a nitrogen-nitrogen single bond

C) each nitrogen has one nonbonding electron pair

D) each nitrogen has two nonbonding electron pairs

E) each hydrogen has one nonbonding electron pair

Answers: cddcb   bbacc   ceaac