chemistrty final exam

In which orbital does an electron in a phosphorus atom experience the greatest effective nuclear charge? A) 1s B) 2s C) 2p D) 3s E) 3p

A) 1s

The de Broglie wavelength of a __________ will have the shortest wavelength when traveling at 30 cm/s. A) car B) planet C) hydrogen atom D) uranium atom E) marble

B) planet

The photoelectric effect is __________. A) a relativistic effect B) the ejection of electrons by a metal when struck with light of sufficient energy C) the darkening of photographic film when exposed to an electric field D) the production of current by silicon solar cells when exposed to sunlight E) the total reflection of light by metals giving them their typical luster

B) the ejection of electrons by a metal when struck with light of sufficient energy

Which of the subshells below do not exist due to the constraints upon the l quantum number? A) 2s B) 2p C) 2d D) all of the above E) none of the above

C) 2d

An electron cannot have the quantum numbers n = _________, l = _________, ml = _________. A) 1, 0, 0 B) 3, 2, 1 C) 3, 2, 3 D) 6, 1, 0 E) 3, 2, -2

C) 3, 2, 3

In the Bohr model of the atom, __________. A) electron paths are controlled by probability B) electrons travel in circular paths called orbitals C) electrons can have any energy D) electron energies are quantized E) both A and C

D) electron energies are quantized

Which of the subshells below do not exist due to the constraints upon the l quantum number? A) 4f B) 4p C) 4d D) 4s E) none of the above

E) none of the above

Refer to test 1 version 111 number 16

Refer to test 1 version 111 number 16. Answer: C

Refer to test 2 version 222 numbers 1-5

Refer to test 2 version 222 numbers 1-5

Refer to test 2 version 222 numbers 9 and 10

Refer to test 2 version 222 numbers 9 and 10

what is the coordination number of I_3^-? a) 2 b) 3 c) 4 d) 5 e) 6

a) 2

Which of the following molecules or ions have multiple resonance structures: hypochlorite, N2O (central N), COF2 (central C)? a) N2O only b) COF2 only c) hypochorite only d) COF2 and N2O e) N2O and hypochlorite

a) N2O only

Which of the following atoms has the highest electron affinity? a) _9F b) _16S c) _33As d) _50Sn

a) _9F

What is the molecular shape of IBrCl_3^-? a) square planar b) t shape c) linear d) bent e) trigonal pyramidal

a) square planar

Reading from top to bottom down any group in the periodic table, the ionic radii _________, the ionization energy ___________, and the electronegativity ___________ a. increases, decreases, decreases b. decreases, decreases, increases c. increases, decreases, increases d. decreases, increases, decreases e. decreases, increases, increases

a. increases, decreases, decreases

What are the approximate O-P-O bond angles in the phosphate anion? a) 90 b) 109 c) 120 d) 180 e) 90 and 180

b) 109

What is the orbital radius of an electron in the n = 1 level of a Li2+ ion? a) 7.52 mm b) 17.64 pm c) 8.82 nm d) 9.49 Angstroms e) 12.22 x 10^-12 m

b) 17.64 pm

What is the coordination number of SeF_3^-? a) 2 b) 3 c) 4 d) 5 e) 6

b) 3

Which of the following transitions represents an ABSORPTION of energy? a) 2d --> 4s b) 6s --> 6p c) 5p --> 3d d) 2p --> 2s

b) 6s --> 6p

What are the Cl-I-Cl bond angles of IBrCl_3^-? a) 120º b) <90º c) <120º d) 180º e) <109.5

b) <90º

What are the bond angles of SeF_3^-? a) 120º b) <90º c) <120º d) 109º e) 90º

b) <90º

What is the AXmEn configuration of IBrCl_3^-? a) AX3E3 b) AX4E2 c) AX5E1 d) AX4 e) AX3E2

b) AX4E2

Which of the following has the HIGHEST ionization energy (IE)? a) Na b) Mg c) K d) Ca

b) Mg

Which of the following has 8 protons, 10 neutrons, and 10 electrons? a) ^19K b) ^18O^2- c) ^18F^2- d) _8O^2- e) _8F^2-

b) ^18O^2-

Which orbitals on the central O overlap to form the O-O sigma bonds in O_3? a) sp b) sp2 c) sp3 d) unhybridized p e) unhybridized s

b) sp2

What mass of O contains the same number of atoms as 2.0 g H2? a. 64 g b. 32 g c. 16 g d. 8 g e. 4 g

b. 32 g

What is the steric number of I_3^-? a) 2 b) 3 c) 4 d) 5 e) 6

c) 4

what is the coordination number of IBrCl_3^-? a) 2 b) 3 c) 4 d) 5 e) 6

c) 4

22. How many valence electrons does Co2+ have? a) 3 b) 5 c) 7 d) 9 e) 11

c) 7

Which bonding model correctly predicts if a molecule is paramagnetic or diamagnetic? a) Lewis structures b) Valence bond theory (hybrid orbital model) c) Molecular orbital theory d) All models can provide that information e) None of the models can provide that information

c) Molecular orbital theory

For which of the following molecules and ions does the nitrogen atom have sp3 hybridization: NO_3^1-, N_2, NHCl_2? a) NO31- only b) N2 only c) NHCl2 only d) N2 and NHCl2 e) NO31- and NHCl2

c) NHCl2 only

What is the hybridization of of I_3^-? a) sp b) sp2 c) sp3 d) sp3d1 e) sp3d2

c) sp3

Which one of the following is correct? a) ν ÷ λ = c b) ν = cλ c) νλ = c d) λ = c ν e) ν + λ = c

c) νλ = c

Where in the periodic table could you find atoms with similar properties? a. within the same block (s,p,d,f) b. within the same period c. within the same group d. all of the above e. atoms are not arranged according to properties

c. within the same group

What is the steric number of SeF_3^-? a) 2 b) 3 c) 4 d) 5 e) 6

d) 5

What is the Axmen configuration of of SeF_3^-? a) AX3 b) AX4E1 c) AX4E2 d) AX3E2 e) AX3E1

d) AX3E2

Which of the following atoms is/are likely to form compounds MCl2 (M=cation, Cl is the chloride anion)? I. Li II. S III. Mg IV. Al a) I b) I&II c) II&III d) III only e) none of the above

d) III only

Which of the following atoms is the LEAST electronegative (EN)? a) _9F b) _16S c) _33As d) _50Sn

d) _50Sn

What is the molecular shape of I_3^-? a) square planar b) t shape c) linear d) bent e) trigonal pyramidal

d) bent

Lower energy electrons are closer/further to the nucleus and are therefore easier/harder to remove and contribute to higher/lower shielding. a) closer, harder, lower b) further, easier, lower c) closer, easier, lower d) closer, harder, higher e) further, harder, higher

d) closer, harder, higher

How many sigma bonds and pi bonds are in N2H4? Note: the atom connectivity is that each N is bonded to the other as well as to two H's. a) four sigma, one pi b) four sigma, two pi c) five sigma, one pi d) five sigma, zero pi e) six sigma, zero pi

d) five sigma, zero pi

What is the hybridization of SeF_3^-? a) sp b) sp2 c) sp3 d) sp3d1 e) sp3d2

d) sp3d1

What is the wavelength of the nhi = 3 → nlo = 2 emission transition in the Balmer series for hydrogen? a. 211 nm b. 459 nm c. 599 nm d. 656 nm e. 811 nm

d. 656 nm

Higher energy electrons are closer/further to the nucleus and are therefore easier/harder to remove and therefore represent a higher/lower electronegativity of the atom. a. closer, easier, lower b. closer, harder, higher c. further, harder, higher d. further, easier, lower e. closer, harder, lower

d. further, easier, lower

Which of the following quantum numbers is/are the primary indicator(s) for the energy of an electron in a subshell of a multi-electron systm? a. ml only b. n only c. l only d. n and l e. l and ml

d. n and l

Consider 85Kr and 87Kr and choose the correct statement(s) below. 1. The two species above are isotopes each with a different number of protons 2. The two species above are isotopes each with a different number of neutrons 3. The two species above are isotopes each with a different mass number a) 1 only b) 2 only c) 3 only d) 1 and 2 e) 2 and 3

e) 2 and 3

Which of the following pairs are isotopes of the same element? 1. 10B & 11B3- 2. 12C & 13C 3. 32S & 34S a) 1 only b) 2 only c) 3 only d) 1 and 2 e) 2 and 3

e) 2 and 3

What is the steric number of IBrCl_3^-? a) 2 b) 3 c) 4 d) 5 e) 6

e) 6

What are the bond angles of I_3^-? a) 120º b) <180º c) <120º d) 180º e) <109.5

e) <109.5

What is the AXmEn configuration of I_3^-? a) AX2E3 b) AX5E1 c) AX1E3 d) AX3E1 e) AX2E2

e) AX2E2

Compare the following elements described by their electron configurations: I: [Kr]5s24d4 and II: [Ar]4s23d104p4 a) I & II are transition metals b) I & II have four unpaired electrons in their highest energy orbitals c) I is the more likely to form a cation d) II has a higher ionization potential than I e) Both c & d are correct

e) Both c & d are correct

Which of the following have 3 unpaired electrons in the outer shell? I. N II. Tc4+ (element 43) III. Ru3+ (element 44) IV. Co (element 27) a) I only b) II&IV c) I&IV d) I&II e) I, II and IV

e) I, II and IV

Consider radiation with the following wavelengths: I. 600 nm II. 200 nm III. 1200 nm Arrange by; highest energy _______, lowest frequency ____, lowest energy _____ a) I, I, II b) III, II, II c) III, II, III d) II, I, I e) II, III, III

e) II, III, III

Which of the following ions is/are isoelectronic with a noble gas? a) P^5+ b) Si^4+ c) Cl^1- d) Si^4- e) all of the above

e) all of the above

Aqueous CH4 reacts with a strong base to form CH_3^-. What change in the hybridization of carbon occurs in this reaction? a) sp to sp2 b) sp2 to sp3 c) sp3 to sp d) sp2 to sp e) no change

e) no change

What is the hybridization of IBrCl_3^-? a) sp b) sp2 c) sp3 d) sp3d1 e) sp3d2

e) sp3d2

What is the molecular shape of SeF_3^-? a) square planar b) square pyramidal c) tetrahedral d) trigonal planar e) t shape

e) t shape

What is the electron configuration of Cr4+ (element 24) a. [Ar] 4s2 3d4 b. [Ar] 3d4 c. [Ar] 4s2 3d0 d. [Ar] 4d2 e. None of the above

e. None of the above

Reading from left to right across any period in the periodic table, the ionic radii _________, the ionization energy ___________, and the electronegativity ___________ a. increases, decreases, decreases b. decreases, decreases, increases c. increases, decreases, increases d. decreases, increases, decreases e. decreases, increases, increases

e. decreases, increases, increases

refer to test 1 version 111 number 23

refer to test 1 version 111 number 23. Answer: D

refer to test 2 version 222 numbers 35-37

refer to test 2 version 222 numbers 35-37 answers: a,e,e

Which electron configuration represents a violation of the Pauli exclusion principle? Refer to test 1 version 1 question 8

refer to test. Answer: E