chemistry unit5 test
what would be the outer electron configuration of group IIIB (Sc,Y, La...)?
(m-1)d1ns2
determine the oxidation number of the underlined element in H2PO2
+1
determine the oxidation number of the underlined element in NaNo3
+5
determine the oxidation number of the underlined lament in Na2SeO4
+6
a police officer is measuring traffic speed with radar operating 1.0 x 10^9 Hz. what is the wavelength of this electromagnetic energy?
0.30A
what is the wavelength in angstroms of radiation used by an x-ray technician, with a frequency of 6.00x10^18s-1?
0.50 x 10^3A
radio waves are very low energy forms of electromagnetic radiation. what is the energy of a photon of radio waves with a wavelength of 150m?
1.33x10^-27J
a graduate student wished to recreate Millikan's "oil drop" experiment. In order to perfect his technique and test his apparatus, he practices performing the experiments many times. If one of his early attempts yielded the following data for the charges on four equal-sized oil drops, what charge per electron would he have calculated and how many electrons were on the drop with the largest number of electrons?
1.65x10^-19, C, 6e-
the atomic weight of antimony is 121.76amu. there are two naturally occurring isotopes of antimony. 121Sb has an isotopic mass of 120.9038 amu and has a natural abundance of 57.40% what is the isotopic mass of the other isotope, 123Sb?
122.9amu
give the number of protons, neutrons, and electrons in the S2- ion
16p, 18n, 18e
an atom of the Ar isotope contains____protons
18
write the balanced net ionic equation for the complete reaction of phosphoric acid and calcium hydroxide. what is the sum of the coefficients?
18
the atomic number of certain element is 19, and its atomic weight is 39. an atom of the element contains ____protons, ____neutrons, and the chemical symbol for the element is
19,20,K
what is the value of the angular momentum quantum numb,r 1, for the following orbital?
2
write the balanced net ionic equation for the complete neutralization of H2SO3, with aqueous NaOH. what is the total charge on the right side of the balanced equation?
2-
consider the Ar isotope. An atom of this isotope contains___neutrons
22
which of the following reactions is NOT spontaneous?
2KCl(aq) + I2(s) --> 2KI(aq) + Cl2(g)
which of the following is both a decomposition reaction and a reduction-oxidation reaction?
2NH4NO3(s)-->2N2(g) + O2(g) + 4H2O(g)
the maximum number of electrons that can occupy an energy level or shell is
2n^2
write the balanced net ionic equation for the reaction of HClO3 with aqueous NH3. Use H+ rather than H3O+. What is the sum of the coefficients?
3
write the net ionic equation for the complete reaction of barium hydroxide and hydrochloric acid. Use H+ rather than H3O+. what is the sum of the coefficients?
3
an alpha particle of mass 4.0026amu has a velocity of 10.0% of the speed of light. what is its de brogile wavelength (in m)?
3.32x10^-15m
the total number of electrons that can be accommodated in the 4th shell is
32
which one of the following represents the net ionic equation for the reaction of nitric acid with aluminum hydroxide?
3H+(aq) + Al(OH)3(s)--> Al3+(aq) + 3H2O(l)
what is the frequency of light of wavelength 700A?
4.29 x 10^14s-1
one of the spectral lines in the emission spectrum of mercury has a wavelength of 6.234x10^-7m. what is the frequency of the line?
4.81 x 10^14 s-1
how many atomic orbitals are there in the 4d subshell?
5
what is the total number of electrons in the fifth energy level (n=5)
50
what is the atomic weight of hypothetical element consisting of two isotopes, one with mass=64.23amu(26.00%), and one with mass=65.32amu?
65.04amu
write the balanced net ionic equation for the complete neutralization of chromium(III) hydroxide with sulfuric acid. Use H+ rather than H3O+ what is the sum of the coefficients?
8
which element has the electron configuration below?
As
which one of the following is the balanced equation for the decomposition of gold(III) sulfide into its elements by heat?
Au2S3--> 2Au + 3S
which one of the following substances is insoluble in water?
BaCO3
will a precipitate form when 0.1M aqueous solutions of Ba(NO3)2 and H2CO3 are mixed? If a precipitate does form, identify the precipitate and give the net ionic equation for the reaction
BaCO3 precipitates. Ba2+(aq) + H2CO3(aq)--> BaCO3(s) + 2H+(aq)
which one of the following is an ionic hydride?
BaH2
which element has the highest elecronegativity?
C
which one of the following reactions is the "water gas" reaction?
C(s) + H2O(g)--> CO(g) +H2(g)
which pair of gases is the product of the "water gas reaction"?
CO+H2
what salt is formed when aqueous calcium hydroxide is mixed with phosphoric acid?
Ca3(PO4)2
if an element has the following electron configuration, what is the symbol for the element?
Cl
which element has the smallest radius?
Cl
which one of the following species is not isoelectronic with neon?
Cl
which of the following elements has an electron in a f5 subshell?
Cm
___is a d-transition metal
Cr
will a precipitate form when 0.1 M aqueous solutions of CrCl3 and (NH4)2S are mixed? If it does form, identify the precipitate and give the net ionic equation for the reaction
Cr2S3 precipitates, 2Cr3+(aq) + 3S2(aq)-->Cr2S3(s)
which of the following is an alkali metal?
Cs
arrange the following elements in order of decreasing first ionization energy
F>N>O>C>Be
the electron configuration 1s22s2sp63s23p64s23d6 represents the element
Fe
which of the following represents the net ionic reaction for all strong acid/strong base reactions that produce a soluble salt?
H+(aq) + OH-(aq)---> H2O(l)
which of the following is an ionization?
HBr(g)-->H+(aq)+Br(aq)
identify the net ionic equation for the reaction of HClO2 and lithium hydroxide
HCLO2(aq) +OH-(aq)--> ClO2(aq) + H2O(l)
which one of the following compounds is not a strong electrolyte?
HF
which one of the following is not a strong electrolyte?
HF
which one of the following is a strong acid?
HI
which of the following matched pairs of name and formulate has an error?
HIO3, periodic acid
which one of the following is a strong acid?
HNO3
which of the following matched paris of name and formulate has an error?
HNO3, nitrous acid
classify the following reaction by giving all of the reaction type(s) that apply. 2PbO(s) +O2(g) --> 2PbO2(s)
I and II
classify the following reaction by giving all of the reaction type(s) that apply. 2NH4NO3(s)--> 2N2(g) + O2(g) + 4H2O(g)
I and III
which of these comparisons according to radius is(are) correct?
I and III
which response includes all of the following substances that are strong electrolytes, and no others?
I,II, and IV
arrange the following elements in order of increasing atomic radii
I<Sb<In<Sr<Rb
which response contains all of the following that are oxidation-reduction reactions and no others?
II
which response lists all the true statements and no false one?
II
what are the oxidation numbers(oxidation states) of the elements in KClO2?
K=+1, Cl=+3, O=-2
which of the following matched pairs of name and formulate has an error?
KH2PO4, potassium hydrogen phosphate
iodine is most likely to form an ionic compound with
Mg
which of the following anions is almost always a spectator ion?
NO3-
an element has the outermost electron configurationns2np4 the element could be
O
which element has the highest electronegativity?
O
which ion has the smallest radius?
O2
arrange the following elements in order of decreasing electronegativities
P>Al>Mg>Na>Cs
which element has the largest atomic radius?
Rb
which element has the lowest electronegativity?
Rb
which of the following pairs of elements would be expected to form an ionic compound?
Rb,Cl
an element that has four electrons in its outer shell in its ground state is
Sn
which element has the lowest first ionization energy?
Sr
which ion has the smallest radius?
Ti
which of the following metals could displace hydrogen from sulfuric acid and form hydrogen gas?
Zn
what is the correct name for NH4ClO3?
ammonium chlorate
in the following reaction, Cl2 is
both the oxidizing agent and the deducting agent
which of the following has a negative charge?
electron
which of the following statements about ionization energy and electron affinity is true?
elements with very high ionization energies usually have very negative electron affinities
the number of electrons present in the p orbitals in the outermost electron shell(major energy level, n) of the halogen atoms is
five
which of the following statements about hydrogen is false?
hydrogen forms only molecular compounds
which are the only free elements that exhibit ferromagnetism?
iron, cobalt and nickel
the amount of energy possessed by a photon is all of the following except?
is inversely proportional to frequency
the heisenberg uncertainty principle states that
it is impossible to determine accurately both the position and momentum of an electron simultaneously
which one of the following is an alkaline earth metal?
megnesium, Mg
of the following, which periodic group(s) do not match their designation?
noble gases, VIIIB
what element has the following electron configuration?
none of these
what would be the outer electron configuration of alkaline earth metals?
ns2
what would be the outer electron configuration of group VIA (O,S,SE,...)?
ns2np4
the number of electrons present in the s orbitals in the outermost electron shell of the group IA metals is
one
which statement regarding the "gold foil" experiment is false?
the alpha particles were repelled by electrons
in the Rutherford gold foil experiment, the fact that most of the alpha particles were not deflected as they passed through the gold foil indicates that
the atom is mostly empty space
in interpreting the results of his "oil drop" experiment in 1909, Robert Millikan was able to determine___
the charge on an electron
which one of the statements below is false concerning the following reaction:
the double arrows indicate that ammonia, NH3, is only very slightly soluble in water
the difference between the mass number of an atom and the atomic number of the atom is always equal to
the number of neutrons in the nucleus
the number of electrons present in the s orbitals in the outermost electron shell of the alkaline earth(Group IIA) metals is
two
