Download CHEM 11 Practice Exam 2

CHEM 11
Practice Exam 2
1) What is the term for the electrons in the highest s and p sublevels in an atom that can undergo reaction
and form chemical bonds?
A) s electrons
B) p electrons
C) bonding electrons
D) valence electrons
E) none of the above
2) Which element has the following electron configuration: 1s2 2s2 2p6 3s2 3p6 4s1?
A) Al
B) Ca
C) K
D) Na
E) none of the above
3) What is the maximum number of electrons in the 3rd energy level?
A) 2
B) 8
C) 18
D) 32
E) none of the above
4) Which of the following orbitals is the lowest energy?
A) 1s
B) 2s
C) 3s
D) 4s
E) All s orbitals are the same energy.
5) What is the name of the family of elements in Group IIA/2?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases
E) none of the above
6) Which of the following cations is isoelectronic with argon?
A) potassium ion
B) calcium ion
C) scandium ion
D) all of the above
E) none of the above
7) What is the core notation for the electron configuration of a cobalt(II) ion, Co2+?
A) [Ar] 4s2 3d5
B) [Ar] 4s2 3d7
C) [Ar] 4s2 3d9
D) [Ar] 3d7
E) none of the above
8) Which of the following is a general trend from left to right in the periodic table of elements?
A) atomic radius increases; ionization energy increases
B) atomic radius increases; ionization energy decreases
C) atomic radius decreases; ionization energy increases
D) atomic radius decreases; ionization energy decreases
E) none of the above
9) Which of the following does not have chemical properties similar to At?
A) antimony
B) bromine
C) chlorine
D) fluorine
E) iodine
10) Predict the number of valence electrons for a Group VIA/16 element.
A) 2
B) 4
C) 6
D) 8
E) 16
11) What is the predicted ionic charge for a S ion?
A) 2+
B) 2C) 6+
D) 6E) none of the above
12) What is the term for a bond in which a pair of electrons is not shared equally?
A) coordinate covalent bond
B) electrovalent bond
C) nonpolar bond
D) polar bond
E) none of the above
13) Which of the following is held together by ionic bonds?
A) CS2
B) CO2
C) CaCl2
D) SO3
E) SiO2
14) Which noble gas is isoelectronic with an aluminum ion?
A) helium
B) neon
C) argon
D) krypton
E) xenon
15) How many valence electrons are in a chlorine atom and a chloride ion?
A) 1 and 8, respectively
B) 7 and 8, respectively
C) 8 and 7, respectively
D) 17 and 18, respectively
E) none of the above
16) Which of the following is a noble gas?
A) He
B) Ar
C) Xe
D) all of the above
E) none of the above
17) How many atoms of nickel are in 58.69 g of nickel? (Refer to the Periodic Table.)
A) 1
B) 28
C) 58.69
D) 59
E) 6.02 × 1023
18) How many krypton atoms are in 2.50 mol of Kr?
A) 1.51 × 1022 atoms
B) 1.51 × 1023 atoms
C) 1.51 × 1024 atoms
D) 2.41 × 1023 atoms
E) 2.41 × 1024 atoms
19) How many moles of argon contain 7.52 × 1022 Ar atoms?
A) 0.0125 mol
B) 0.0801 mol
C) 0.125 mol
D) 0.801 mol
E) 1.25 mol
20) What is the molar mass of mercuric nitrate, Hg(NO3)2?
A) 246.60 g/mol
B) 310.60/mol
C) 324.61 g/mol
D) 380.65 g/mol
E) 525.20 g/mol
21) What is the mass in grams of a single atom of silver?
A) 1.54 × 10-26 g
B) 1.66 × 10-24 g
C) 1.79 × 10-22 g
D) 5.58 × 1021 g
E) 6.50 × 1025 g
22) Which of the following wavelengths of light is in the visible region of the radiant energy spectrum?
A) 180 nm
B) 570 nm
C) 750 nm
D) all of the above
E) none of the above
23) How many photons of light are emitted when the electron in a hydrogen atom drops from energy level
3 to 1?
A) 1
B) 2
C) 3
D) 4
E) none of the above
24) Which element has the following electron configuration: [Ar] 4s2 3d5?
A) Br
B) Cl
C) Kr
D) Mn
E) Tc
25) Which of the following is the electron dot formula for an atom of potassium?
A)
B)
C)
D)
E)
26) Predict which of the following has a covalent bond (refer to Periodic Table).
A) CO2
B) NO2
C) SO2
D) all of the above
E) none of the above
27) Which of the following is held together by ionic bonds?
A) Ag2O
B) CO2
C) P2O5
D) SO3
E) XeO3
28) Which of the following shows a general increasing trend for electronegativity in the periodic table?
A) down a group of metals
B) down a group of nonmetals
C) across a series of metals from right to left
D) across a series of nonmetals from left to right
E) none of the above
29) What is the term for the statement that an atom tends to bond in such a way so as to acquire eight
valence electrons?
A) atomic rule
B) bonding rule
C) electron rule
D) octet rule
E) none of the above
Answer Key
Practice Exam 2
Fall 06
1. D
2. C
3. C
4. A
5. B
6. D
7. A
8. C
9. A
10. C
11. B
12. D
13. C
14. B
15. B
16. D
17. E
18. C
19. C
20. C
21. C
22. B
23. A
24. D
25. A
26. D
27. A
28. D
29. D