TTU General Chemistry

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Chem 111 - Quiz 6B - Fall, 1997
Chapters VI, VII: Chemical Periodicity and Bonding

1. Which of the following elements has an ns2np2 outer level electron configuration?

a) Ne
b) N
c) O
d) Cl
e) C

2. Which outer shell electron configuration is typical of an alkaline earth metal?

a) ns1
b) ns2np4
c) ns2
d) ns2np6
e) ns2np5

3. Which sublevel is being filled in proceeding from element Y to element Cd?

a) 4d
b) 3d
c) 5d
d) 4f
e) 5s

4. Which species is INCORRECTLY matched with the electron configuration?

a) Na+ = 1s22s22p6
b) S2- = 1s22s22p63s23p2
c) Ca2+ = 1s22s22p63s23p6
d) Sc3+ = 1s22s22p63s23p6

5. Which of the following species is NOT isoelectronic with the others?

a) N3-
b) O2-
c) F-1
d) K+
e) Al3+

6. Which atom below is the largest?

a) S
b) Ca
c) Al
d) K
e) F

7. Which atom below has the largest first ionization energy?

a) N
b) O
c) S
d) Li
e) Cs

8. Which species below is the smallest?

a) Mg2+
b) Na+
c) F-
d) N3-
e) Ne

9. Which elements below has the largest electronegativity?

a) Li
b) S
c) O
d) Na
e) Cs

10. Which element pair will form the most ionic bond?

a) C, H
b) C, O
c) Li, H
d) Na, Cl

11. Which statement is INCORRECT?

a) Electron affinity is the amount of energy needed to attach an electron to a gaseous element.
b) Once an electron has been removed from a neutral atom, the second electron is usually easier to remove.
c) First ionization is the minimum amount of energy required to remove the most loosely held electron from a gaseous atom.
d) Metals have lower ionization energies than nonmetals.
e) Elements with low ionization energies typically form ionic compounds with nonmetals by losing electrons.

12. The person credited with the discovery of oxygen is:

a) Benjamin Franklin
b) Henry Cavendish
c) Robert Boyle
d) G.N. Lewis
e) Joseph Priestley

13. Which of the following methods/reactions will NOT produce hydrogen gas?

a) by reacting an active metal with an aqueous solution of an acid
b) by passing steam through a hot gun barrel
c) all will produce hydrogen gas
d) by reacting methane, CH4, with steam in the presence of a catalyst
e) by reacting a metal hydride with water

14. Which of the ways listed in Problem #13 was the first means used for preparing hydrogen in pure form?

a) answer a
b) answer b
c) answer c
d) answer d
e) answer e

15. Which of the following compounds would be classified as a basic anhydride?

a) ClO2
b) NO2
c) SO3
d) MgO

16. Which element is present in the greatest abundance by mass in Earth's biosphere?

a) silicon
b) oxygen
c) hydrogen
d) nitrogen
e) aluminum

17. Oxygen was first prepared in the laboratory in 1774 by heating which of the following compounds?

a) NO2
b) H2O
c) HgO
d) KClO3
e) MgO

18. The principal product of the reaction of oxygen with sodium is:

a) Na2O2 (sodium peroxide)
b) Na2O (sodium oxide)
c) NaO2 (sodium superoxide)

19. Complete the following reaction, ignoring the balancing coefficients: Na2O + H2O --->

a) NaH + H2O2
b) NaOH + H2(g)
c) NaOH
d) NaH + O2
e) no reaction

20. Which of the following when dissolved in water will NOT form an acid solution?

a) SO2
b) SO3
c) NO2
d) CO2
e) H2

21. Which of the following substances is the "brown cloud" over many cities?

a) SO2
b) NO2
c) SO3
d) O3
e) CO2

22. Which of the following is the INCORRECT Lewis Dot Formula for an atom?

23. How many valence electrons does carbon have?

a) 3
b) 6
c) 1
d) 4
e) 2

24. What is the maximum valence of nitrogen?

a) 1
b) 7
c) 4
d) 5
e) 3

25. How many valence electrons are available in the CNS- species?

a) 15
b) 29
c) 16
d) 25
e) 14

26. How many shared pairs of electrons are found in the electron dot formula of carbon disulfide, CS2?

a) 6
b) 4
c) 2
d) 8
e) 16

27. How many lone pairs of electrons are found in the electron dot formula of methanol, CH3OH?

a) 1
b) 4
c) 2
d) 3
e) 8

28. In which of the following species would one expect to find RESONANCE?

I. CO2
II. HNO2
III. SO2
IV. CO32-

a) All of them
b) II, III and IV
c) III and IV
d) I only

29. In which of the following species would one expect to find the presence of double bonds?

I. CH3F
II. CO2
III. CS2

a) All of them
b) II only
c) I only
d) II and III

30. Which of the following species contain at least one POLAR covalent bond?

I. HBr
II. CO
III. CCl4
IV. Cl2

a) All of them
b) I, II and III
c) I and II
d) I, II and IV
e) IV only

KEY

1.e 2.c 3.a 4.b 5.d 6.d 7.a 8.a 9.c 10.d 11.b 12.e 13.c 14.b 15.d 16.b 17.c 18.a 19.c 20.e 21.b 22.a 23.d 24.e 25.c 26.b 27.c 28.b 29.d 30.b