CHEM: Test 3
Arrange the elements C, O, and H in order of increasing electronegativity A) C < O < H B) H < C < O C) C < H < O D) O < C < H E H < O < C
B
.What type of chemical bond holds the atoms together within a water molecule? A) Ionic bond B) Nonpolar covalent bond C) Polar covalent bond D) Coordinate covalent bond
C
In which of the following pairs of ions Are the two members of the pair isoelectronic? A. F- and Cl- B. Na and Ca2+ C. Al and O2- D. More than one correct response E. no correct response
C
In which of the following pairs of molecules do both members of the pairs have the same molecular geometry A. SO(2) and CO(2) B. H(2)S and HCN C.H(2)O and OF(2) D. more than one correct response E. no correct response
C
The mechanism for ionic bond formation always involves the transferring of A. Electron from the nonmetallic atoms to metallic atoms. B. Protons from the nucleus of metallic atoms to the nucleus of nonmetallic atoms. C. sufficient electrons to produce ions of equal but opposite change. D. More than one correct response E. No correct response
C
Transition metal elements have atoms or ions with partially filled A) s subshells B) p subshells. C) d subshells. D) f subshells. E) g subshells.
C
Which element has the following ground-state electron configuration?[Xe]6s(2)4f(14)5d(10) A. Lu B. Cd C. Hg D. Lr E. Au
C
Which of the following is the correct electronic configuration for the for the element (20)Ca A,1s(2)2s(2)2p(6)3s(2) B. 1s(2)2s(2)3s(2)4s(2) C. 1s(2)2s(2)2p(6)3s(2)3p(6)4s(2) D.1s(2)s2(2)2p(6)3s(2)3p(6)3d(10)4s(2) E. No correct response.
C
Which of the following statement about a d subshell is correct? A. seven orbitals are present within it. B.The maximum number of electrons it can contain is 14 C. All electrons present have the same energy D. more than one correct response E. no correct response
C
Which of the following statement is consistent with the electron configuration 1s(2)2s(2)2p(6)3s(2)3p(4) A. there are 4 electrons in a 3p orbital B. There are 4 electrons in a 3p subshell C. There are 4 electrons in the third shell. D. More than one correct response E. No correct response.
C
Which of the following statements concerning electron shells are correct A. The shell number gives the number of electrons present B. All electrons present in a shell have the same energy C. The number of subshells present is the same as the shell number D. more than one correct response E. no correct response.
C
Which of the following sets of element is arranged in the order of increasing electronegativity A.CL, S, P, Si B. B, O, H, F C. F, Cl, Br, I D. more than one correct response E. no correct response
E
Classify the Ca — Cl bond in CaCl2 as ionic, polar covalent, or nonpolar covalent. A) ionic B) polar covalent C) nonpolar covalent
A
Define electronegativity: A) an atoms ability to attract electrons that are shared in a chemical bond B) an atoms ability to form an ionic bond with another atom C) an atoms ability to donate valence electrons to another atom D) an atoms ability to form a cation
A
For which of the following elements is the listed number of valence A. Mg (two valence electron) B. N(three valence electron) C. F(one valence) D. More than one correct response E. no correct response
A
In which of the following ions pairs of ionic compounds do both members of the pair contain a positive ion with +1 A. CaS and MgO B. Na3N and Li2S C. AlCl3 and BaCl2 D. More than one correct prsponse E. No correct response
B
The number of lone electron pairs in the N2 molecule is ___. A. 1 B. 2 C.3 D. 4 E. 5
B
When the electronegativity difference between two atom in a bond is 0.9 the bond is classified as A. a nonpolar bond B. a polar bond c. a coordinate covalent bond D. an ionic bond E. no correct response
B
Which element has the following ground-state electron configuration?1s(2)2s(2)2p(6)3s(2) A. Na B. Mg C. Al D. Si E. Ne
B
Which element has the following ground-state electron configuration?[Ar]4s23d104p5 A. aresnic B. bromine C. iodine D. selenium E. tellerium
B
Which element has the following ground-state electron configuration?[Kr]5s(1)4d(5) A. Mn B. Mo C. Nb D. Re E. Tc
B
Which element has the following ground-state electron configuration?[Kr]5s(2)4d(10)5p(3) A. Sn B. Sb C. Pb D. Bi E. Te
B
Which of the following atoms is paramagnetic both in its ground state and in all of its excited states? A. C B. N C. O D. Ti E. Cr
B
Which of the following pieces of information about an element is not found on a standard periodic table? A atomic number B. mass number C. atomic mass D. more than one correct response E. no correct response
B
Which one of the following is most likely to be a covalent compound? A) CsOH B. NF(3) C. Sr(NO3)(2) D. Al(2)O(3) E. CaSO(4)
B
Which one of the following is most likely to be an ionic compound? A). ClF(3) B) FeCl(3) C) NH(3) D) PF(3) E) SO(3)
B
Arrange the elements Ba, Br, and Ga in order of increasing electronegativity A) Ba < Br < Ga B) Br < Ga < Ba C) Ba < Ga < Br D) Ga < Ba < Br E) Ga < Br < Ba
C
Eighteen electrons are present in the Lewis structure of which of the following? A. CO(2) B. N(2)O C. SO(2) D. More than one correct response E. no correct response
C
How many unpaired electrons does an atom of carbon have in its ground state A. 0 B. 1 C. 2 D. 3 E. 4
C
How many unpaired electrons does an atom of sulfur have in its ground state? A. o B. 1 C. 2 D. 3 E. 4
C
The electron configuration of a ground-state vanadium atom is A. [Ar]4s(2)4d(3) B. [Ar]4s(2)4p(3) C. [Ar]4s(2)3d(3) D. [Ar]3d(5)
C
Which of the following molecules would be classified as polar molecule A.SO2-4 b.H2SO4 c. Na2SO4 D. more than one correct response E. no correct response
D
Which of the following statements concerning Lewis structure is correct? A. The lewis structure for N2 contains six nonbonding electrons. B. The Lewis structure for CH4 contains eight bonding electrons C. The Lewis structure for HCN contains a triple bond. D. more than one correct response E. no correct response
D
A ground-state chromium atom has how many unpaired electrons? A. 1 B. 2 C. 4 D. 5 E. 6
E
A nonpolar covalent bond (i.e., pure covalent) would form in which one of the following pairs of atoms? A) Na — Cl B) Si — Si C) Ca — Cl D) Cr — Br E) P — Cl
E
Which of the following is an incorrect element characterization? A. Element 11 is an alkali metal B. Element 9 is in a halogen C. Element 2 is in a noble gas D. More than one correct response. E. No correct response
E
Which of the following pairing of concept pertaining to periodic table is an incorrect pairing? A. group and Column B. period and row C. periodic table and graphical portrayal of the periodic law D. More than one correct response. E. No correct response
E
The electron configuration of a ground-state Co atom is A. [Ar]4s(2)3d(7) B. 1s(2)2s(2)2p(6)3s(2)d(9) C. [Ne]3s(2)3d(7) D. [Ar]4s(1)3d(5) E. [Ar] 4s(2)4d(7)
A
The elements constituting a group in the periodic table? A. have similar chemical properties B. are called isotopes C. have consecutive atomic numbers D. more than one correct response E. no correct response
A
Which element has the following ground-state electron configuration?[Xe]6s(2)4f(14)5d(10) A. W B. Pm C. Mo D. Np E. Re
A
Which of the following atoms is diamagnetic in its ground-state? A. Ca B. As C. Cu D. Fe E. none of these
A
Which one of the following is most likely to be an ionic compound? A. CaCl(2) B. Co(2) C. Cs(2) D. So(2) E. OF(2)
A
Arrange the elements F, P, and Cl in order of increasing electronegativity A) F < P < Cl B) P < Cl < F C) Cl < P < F D) P < F < Cl E) Cl < F < P
B
Classify the C — Cl bond in CCl4 as ionic, polar covalent, or nonpolar covalent. A) ionic B) polar covalent C) nonpolar covalent
B
Classify the O — H bond in CH3OH as ionic, polar covalent, or nonpolar covalent. A) ionic B) polar covalent C) nonpolar covalent
B
How many core electron are present in an atom whose electron configuration is [Ne]3s(2)3p(4)? A. 6 B. 10 C. 16 D. 18 E. no correct response
B
Which of the following is an incorrect statement about the number of electrons lost or gained by a representative element during ion formation? A. The number does not usually exceed three electron. B. The number is related to the position of the element in the periodic table. C. the number is always the same as the number of valence electrons present. D. More than one correct response. E. No correct response
C
Both a number and a letter are used in designating an electron subshell. The letter A. indicates the shell to which the subshell belongs. B. may be s, p, d, or f. C. gives information about the maximum number of electrons the subshell may hold D. more than one correct response E. No correct response
D
Lanthanide (or rare earth elements) have atoms or ions with partially filled A) s subshells. B) p subshells. C) d subshells. D) f subshells. E) g subshells
D
Which of the following elements would have a Lewis symbol that contains five dots? A. 5B B. 7N C. 15P D. More than one correct response E. No Correct response
D
Which of the following is a possible bonding behavior for an element that has four valence electrons A. formation of four single bonds B. formation of two double bonds C. formation of one single bond and one triple bons. D. more than one correct response E. no correct response.
D
