This document contains a 10 question multiple choice test on electronic structure of atoms. The questions cover topics like calculating frequencies of electromagnetic waves based on wavelength, exceptions to the Aufbau principle in electron configuration, writing electron configurations using noble gas notation, identifying elements based on their electron configurations, relationships between emission spectra and electron energy changes, the Heisenberg uncertainty principle, limitations of Rutherford's model of the atom, and the number of electrons that can occupy atomic orbitals.

1. Quarter II General Chemistry 1
Electronic Structure of Atoms
STEM_GC11ESIIa-b-(52to59)
Multiple-Choice Test
Choose the letter of the correct answer. Write your answer on the space provided
before each number.
___1. Calculate the frequency in hertz of a radar wave with a wavelength of 125
mm.
A. 2.40 × 109
B. 2.40 × 1024
C. 2.40 × 106
D. 2.40 × 102
___2. The electron configurations for some elements differ from those predicted
by the aufbau principle because the
A. lower energy levels are completely filled.
B. lower energy levels are empty.
C. electron must spin in opposite directions.
D. half-filled levels are more stable than some other arrangements.
___3. Write the electron configuration for the atom Rb, using the appropriate
noble-gas inner core for abbreviation.
A. [Ne]5s1
B. [Kr]5s1
C. [Ar]5s1
D. [Ar]4s1
___4. Identify the element that corresponds to the following electron
configuration: [Kr]5s24d105p1.
A. Y
B. In
C. Sb
D. Ga

2. Quarter II General Chemistry 1
Electronic Structure of Atoms
STEM_GC11ESIIa-b-(52to59)
Multiple-Choice Test
___5. The frequencies in the emission spectra for an element are directly
proportional to the
A. initial energy level of the electrons.
B. energy changes of the electrons.
C. final energy level of the electrons.
D. energy of the ground state.
___6. The Heisenberg uncertainty principle states that it is impossible to
precisely know both the position and the __________ of an electron in an
atom.
A. mass
B. color
C. momentum
D. shape
___7. Rutherford's planetary model of the atom could NOT explain the
A. deflection of alpha particles by gold foil.
B. chemical properties of elements.
C. appearance of empty space in atoms.
D. separation of positive and negative charges.
___8. Identify the element that corresponds to the following electron
configuration: [Ar]4s23d104p4.
A. Se
B. S
C. Ge
D. Cr
___9. Identify the element that corresponds to the following electron
configuration: [Ne]3s23p1.
A. B
B. C
C. Al
D. Si

3. Quarter II General Chemistry 1
Electronic Structure of Atoms
STEM_GC11ESIIa-b-(52to59)
Multiple-Choice Test
___10. How many electrons can occupy a 5f subshell?
A. 8
B. 10
C. 12
D. 14

4. QuarterIIGeneralChemistry1
ElectronicStructureofAtoms
STEM_GC11ESIIa-b-(52to59)
Multiple-ChoiceTest
CORRECTANSWERS:
1.Calculatethefrequencyinhertzofaradarwavewithawavelengthof125
mm.
CORRECT:2.40×109
2.Theelectronconfigurationsforsomeelementsdifferfromthosepredictedby
theAufbauprinciplebecausethe
CORRECT:half-filledlevelsaremorestablethansomeotherarrangements.
3.WritetheelectronconfigurationfortheatomRb,usingtheappropriate
noble-gasinnercoreforabbreviation.
CORRECT:[Kr]5s1
4.Identifytheelementthatcorrespondstothefollowingelectronconfiguration:
[Kr]5s24d105p1.
CORRECT:In
5.Thefrequenciesintheemissionspectraforanelementaredirectly
proportionaltothe
CORRECT:energychangesoftheelectrons.
6.TheHeisenberguncertaintyprinciplestatesthatitisimpossibletoprecisely
knowboththepositionandthe__________ofanelectroninanatom.
CORRECT:momentum
7.Rutherford'splanetarymodeloftheatomcouldNOTexplainthe
CORRECT:chemicalpropertiesofelements.
8.Identifytheelementthatcorrespondstothefollowingelectronconfiguration:
[Ar]4s23d104p4.
CORRECT:Se
9.Identifytheelementthatcorrespondstothefollowingelectronconfiguration:
[Ne]3s23p1.
CORRECT:Al
10.Howmanyelectronscanoccupya5fsubshell?
CORRECT:14