Midterm Review. 1. Which particle is electrically neutral? (1) proton (3) neutron (2) positron (4) electron
Midterm Review 1. Which particle is electrically neutral? (1) proton (3) neutron (2) positron (4) electron 2. Which particle has approximately the sam...
Midterm Review 1. Which particle is electrically neutral? (1) proton (3) neutron (2) positron (4) electron 2. Which particle has approximately the same mass as a proton? (1) alpha (3) electron (2) beta (4) neutron
7. Experiments performed to reveal the structure of atoms led scientists to conclude that an atom's (1) positive charge is evenly distributed throughout its volume (2) negative charge is mainly concentrated in its nucleus (3) mass is evenly distributed throughout its volume (4) volume is mainly unoccupied
3. Experimental evidence indicates that the nucleus of an atom (1) contains most of the mass of the atom (2) contains a small percentage of the mass of the atom (3) has no charge (4) has a negative charge
8. The atomic number of an atom is always equal to the total number of (1) neutrons in the nucleus (2) protons in the nucleus (3) neutrons plus protons in the atom (4) protons plus electrons in the atom
4. The major portion of an atom's mass consists of (1) electrons and protons (2) electrons and neutrons (3) neutrons and positrons (4) neutrons and protons
9. Which of the following atoms has the greatest nuclear charge? (1)}4N (2) 162C (3)?H (4) L
As the atoms of the iodine react to form molecules of iodine, the stability of the iodine (1) decreases (3) remains the same (2) increases 31. Which is the formula of an ionic compound? (1) SO2 (3) CH3OH (2) CO2 (4) NaOH 32. Which formula represents a substance that contains covalent bonds? (1) LiCl (3) K20 (2) CaCl2 (4) C02 33. Which type of bonds are formed when calcium atoms react with oxygen atoms? (1) polar covalent (3) ionic (2) coordinate covalent (4) hydrogen
36. Metallic bonding occurs between atoms of (1) fluorine (3) sulfdr (2) neon (4) copper 37. Which type of bonding involves positive ions immersed in a sea of mobile electrons? (1) ionic (3) polar covalent (2) nonpolar covalent (4) metallic 38. Which electron-dot diagram best represents a compound that contains both ionic and covalent bonds? ^ H:S: H (2)
Ca 2+ ::s:o:
(3)
(4)
K+[:Br:J .. ..
IBrlBr:
39. Which molecule contains a nonpolar covalent bond? (1) I2 (3) H20 (2) NH3 (4) CO
40. Which type of bond is present in a water molecule? (1) polar covalent (3) ionic (2) nonpolar covalent (4) electrovalent
46. When a uranium nucleus breaks up into fragments, which type of nuclear reaction occurs? (1) fusion (3) replacement (2) fission (4) redox
41. Which equation represents alpha decay?
(4)g 2 Rn-»JJ 8 Po+* 42. Which equation represents artificial transmutation? (1) H2O -> IT" + (2) UF6 + 6Na 6NaF + U He (3) g8U H > 90 1 2 30p (4) gAl + 15r
47. What is the primary result of a fission reaction? (1) conversion of mass to energy (2) conversion of energy to mass (3) binding together of two heavy nuclei (4) binding together of two light nuclei 48. Which nuclear equation represents a fusion reaction? W 92
on -»
(3) J4( (4)}H + ; H ^ ' H e
43. Given the nuclear equation: 49. Which pair of nuclei can undergo a fusion reaction? What is particle Jf? (1) potassium-40 and cadmium-113 (1) an alpha particle (3) a deuteron (2) zinc-64 and calcium-44 (2) a beta particle (4) atriton (3) uranium-238 and lead-208 (4) hydrogen-2 and hydrogen-3 44. Which reaction represents natural nuclear decay? (l)H + + H20 50. In the reaction: (2)KC1O3
X + |H -> ^Li + ^He
45. What is the name of the process in which the nucleus of an atom of one element is changed into the nucleus of an atom of a different element? (1) decomposition (3) substitution (2) transmutation (4) reduction
The nucleus represented by Xis (1) ?Li (2) ^°B (3) fce (4) J°C
1 . In the modern wave-mechanical model of the atom, the orbitals are regions of the most probable location of 1) protons 2) neutrons 3) electrons 4) positrons 2. Which electron configuration represents an atom of lithium in an excited state? 1) ls]2s] 2) Isl2s2 3) Is22sl 4) \s22s2 3. Which orbital notation represents a noble gas in the ground state?
1)
3) 1S2
2)
1s2
2s2
1s2
2s1
4)
1s2
2s2
4. The orbital notation of an atom in the ground state is
1s
2s
N H Which atom is represented by this notation? 1) C 2) N
3) B
4) Be
5. What is the electron configuration of a Mn atom in the ground state? 1) Is22s22p63s2 2) Is22s22p63s23p63d54s2 3) Is22s22p63s23p63d54sl4pl 4) Is22s22p63s23p63d7 6. What is the electron configuration of a fluoride ion (F~) in the ground state? 1) Is22s22p4 2) Is22s22p5 3) 4) Is22s22p7 1. Silicon dioxide (SiO2) and diamonds are best described as 1) molecular substances with coordinate covalent bonding 2) molecular substances with ionic bonding
3) network solids with covalent bonding 4) network solids with ionic bonding
8. A certain substance is a poor conductor of electricity and has a high melting point. This substance is most likely 1) C02 2) SiO2 3) C12 4) C6HI206 9. Which organic compound is a saturated hydrocarbon? 1) ethyne 2) ethene 10. Which formula represents an unsaturated hydrocarbon? 1) CH2CHC1 2) CH3CH2C1
3) ethanol
4) ethane
3) CH3CH2CH3
4) CH3CHCH2
11. Which formula represents propyne? 1) C3H4 2) C3H6 3) C5H8 4) C5H10 12. Which element has atoms that can bond with each other to form long chains or rings? 1) carbon 2) nitrogen 3) oxygen
4) fluorine
13. Which structural formula is incorrect! D
M
2 )H
H —C—Cl
3)
H
\c
O
4)
H —C—OH H/
H
H\C=C—C—H V
\
H H
H
14. Organic compounds that are essentially non-polar and exhibit weak intermolecular forces have 1) low vapor pressure 3) high boiling points 2) low melting points 4) high electrical conductivity in solution 15. Given the structural formulas:
Formula A H H I I H-C-C-OH I I H H
Formula B
Formula C
H
H I H-C-O-C-H I I H H
H O H I II I H-C-C-C-H I I H H
Which two formulas represent compounds that are isomers of each other? 1) AandB 2) A and C 3) BandD 16. The three isomers of pentane have different 1) formula masses 2) molecular formulas
Formula D H I
H-C-C-C-H I I I H H H
4) CandZ)
3) empirical formulas
4) structural formulas
17. Given the three organic structural formulas shown below:
H 0 H I If i H—C—C—C—H
H
O II
H—C—C—OH H
OHH I I
H —- J
A
Which organic compound classes are represented by these structural formulas, as shown from left to right? 1) ester, organic acid, ketone 3) ketone, aldehyde, alcohol 2) ester, aldehyde, organic acid 4) ketone, organic acid, alcohol
18. Given the formulas of four organic compounds:
(a)
(b)
H H O I I II H-C-C-C-H
(c)
H O H I II I H-C-C-C- •H
H H
H
H
H
H
H H
H O
H-C-C-C-OH I I H H
( d ) H-C-C-C-H I I I H OHH
Which pair below contains an alcohol and an acid? 1) a and b 2) a and c
3) bandd
4) c and d
19. What is the IUPAC name for the compound that has the condensed structural formula CH3CH2CH2CHO? 1) butanal 2) butanol 3) propanal 4) propanol 20. What is the IUPAC name of the compound with the following structural formula?
H O H H I
II
I
I
I
I
P — L/ p— o p •—o p—u n H —• o
I
H 1) propanone
H H
2) propanal
21. Which structural formula represents 1,1 -dibromopropane? 1) H H 2)
n
H-C-C-H
H-C-C-H
Br Br
Br H
22. The compound CH3COOCH3 is classified as 1) an acid 2) an ester
3) butanone
3)
4) butanal
V H
H -_—Oo-i- - f>o-.
f\i L/
4)
Br H
H
H-C-C-C-H
n
Br H
Br Br H
3) a hydrocarbon
4) an alcohol
3)
4)
H
23. Which structural formula represents an ether?
1)
H O
2)
H-C-C-H I H
H O I II H-C-C-OH I H
H
H
I I H-C-C-OH
1
H
I
H
H I
H-C-O-C-H I I H
24. Given the balanced equation for an organic reaction: C2H2 + 2C12
C2H2C14
This reaction is best classified as 1) addition 2) esterification
3) fermentation
H I
4) substitution
H
25. Given the equation: C2H6+ C12 -> C2H5C1 + HC1 This reaction is best described as 1) addition involving a saturated hydrocarbon 2) addition involving an unsaturated hydrocarbon
3) substitution involving a saturated hydrocarbon 4) substitution involving an unsaturated hydrocarbon
26. The process of joining many small molecules into larger molecules is called 1) neutralization 2) polymerization 3) saponiflcation
4) substitution
27. Which compound will react with CH3COOH to form the ester methyl ethanoate? 1) CH3OCH3 2) CH3COCH3 3) CH3OH 4) CH3COOH 28. What are the two main products of a fermentation reaction? 1) ethanol and carbon dioxide 2) ethanol and water
3) sugar and carbon dioxide 4) sugar and water
29. When butane burns in an excess of oxygen, the principal products are 1) C0 2 andH 2 O 2) CO 2 andH 2 3) COandH 2 O 4) COandH 2 30. The hydrolysis of a fat by a base is called 1) saponiflcation 2) esterification
3) polymerization
4) neutralization
f j f ; oi /e r tr\r Key
1.
3
24.
3
47.
1
2.
4
25.
4
48.
4
3.
1
26.
1
49.
4
4.
4
27.
2
50.
3
5.
1
28.
1
6.
3
29.
1
7.
4
30.
2
8.
2
31.
4
9.
1
32.
4
10.
1
33.
3
11.
1
34.
3
12.
2
35.
1
13.
1
36.
4
14.
1
37.
4
15.
2
38.
2
16.
4
39.
1
17.
1
40.
1
18.
4
41.
4
19.
1
42.
4
20.
4
43.
1
21.
4
44.
3
22.
1
45.
2
23.
1
46.
2
Answer Key midterm review orgo and electron conflgs [Jan 06,2011]
