Test Bank For Organic Chemistry 8th Edition All Chapters - 9780134042282

Test Bank For Organic Chemistry, 8e Chapter 1 Remembering General Chemistry: Electronic Structure and Bonding 1) Atoms with the same number of protons but different numbers of neutrons are called
________.
Answer: isotopes
Section: 1 -1
2) Which of the fol lowing elements does this electronic configuration represent?
1s2 2s2 2p5 A) F
B) C
C) N
D) Al
E) O
Answer: A
Section: 1 -2
3) How many unpaired electrons are present in the isolated carbon atom (atomic number = 6)?
A) none
B) one
C) two
D) three
E) four
Answer: C
Section: 1 -2
4) Which of the following is the electronic configuration of the element Fe?
A) 1s 2 2s2 2p6 3s2 3p6 4s2 3d6
B) 1s 2 2s2 2p6 3s2 3p8 3d6
C) 1s 2 2s2 2p8 3s2 3p6 4s2 3d6
D) 1s 2 2s2 2p6 3s2 3p6 4s2 4d6
E) 1s 2 2s2 2p6 3s2 3p6 4s2 4p6
Answer: A Section: 1 -2 5) The atomic number of boron is 5. The correct electronic configuration of boron is
A) 1s 2 2s3.
B) 1s 2 2p3.
C) 1s 2 2s2 2p1.
D) 2s 2 2p3.
E) 1s 2 2s2 3s1.
Answer: C Section: 1 -2 Page 1 6) Which of the following statements correctly descr ibes the third electron shell that surrounds the nucleus of an atom? A) The third shell contains only s and p atomic orbitals. B) The maximum number of electrons that can occupy the third shell is 18. C) The total number of atomic orbitals present in the t hird shell is 16. D) The third shell can contain f orbitals. E) All third shell elements must have d electrons. Answer: B Section: 1 -2 7) Ar, K +, Cl- are isoelectronic elements (elements with the same number of electrons). What orbital does the last ele ctron occupy? Answer: 3p orbital Section: 1 -2 8) Give the electronic configuration for N -3. A) 1s 22s2 B) 1s 22s22p3 C) 1s 22s22p4 D) 1s 22s22p6 E) 1s 22s22p63s1 Answer: D Section: 1 -2 9) Give the electronic configuration for Ca +2. Answer: 1s 22s22p63s23p6 Section: 1 -2 10) Identify the least electronegative atom. A) P B) Na C) I D) B E) O Answer: B Section: 1 -3 11) Give the number of nonbonding lone pairs of electrons in H 2NOH. A) 0 B) 1 C) 2 D) 3 E) 4 Answer: D Section: 1 -4 Page 2 12) The compound methyla mine, CH 3NH2, contains a C -N bond. In this bond, which of the following best describes the charge on the nitrogen atom? A) +1 B) slightly positive C) uncharged D) slightly negative E) -1 Answer: D Section: 1 -3 MCAT: 1.2 13) Which of the compounds below have bonds that are predominantly ionic? A) KCl B) CF 4 C) NH 3 D) both A and B E) both B and C Answer: A Section: 1 -3 MCAT: 1.3 14) What type of bonding is most important in CH 3CH2CH2CH2CH2CH3? A) ionic B) hydrogen C) covalent D) polar Answer: C Secti on: 1 -3 MCAT: 1.3 GLO: G2 15) Which of the following contain(s) polar covalent bonds? A) NH 3 B) Na 2O C) H 2 D) KF E) both A and C Answer: A Section: 1 -3 MCAT: 1.3 Page 3