How does the energy of an How does the energy of an electron change when the electron change when the

electron moves closer to the electron moves closer to the nucleus?nucleus?

a.a. It decreases.It decreases.c. It stays the same.c. It stays the same.

b.b. It increases.It increases.d.d. It doubles.It doubles.

The principal quantum number indicates what property of an electron?

a.positionc. energy levelb.speedd. electron cloud shape

What is the shape of the 3p atomic orbital?

a.spherec. barb.Dumbbelld. two perpendicular dumbbells

How many energy sublevels are How many energy sublevels are in the second principal energy in the second principal energy

level?level?

a.a. 11 c.c. 33b.b. 22 d.d. 44

What is the maximum number of What is the maximum number of ff orbitals in any single energy level orbitals in any single energy level

in an atom?in an atom?

a.a. 11 c.c. 55b.b. 33 d.d. 77

What is the maximum number of What is the maximum number of dd orbitals in a principal energy orbitals in a principal energy

level?level?

a.a. 11 c.c. 33b.b. 22 d.d. 55

What is the maximum number of What is the maximum number of orbitals in the orbitals in the pp sublevel? sublevel?

a.a. 22 c.c. 44b.b. 33 d.d. 55

What is the maximum number of What is the maximum number of electrons in the second principal electrons in the second principal

energy level?energy level?

a.a. 22 c.c. 1818b.b. 88 d.d. 3232

When an electron moves from a When an electron moves from a lower to a higher energy level, the lower to a higher energy level, the

electron ____.electron ____.

a.a. always doubles its energyalways doubles its energyb.b. absorbs a continuously variable absorbs a continuously variable

amount of energyamount of energyc.c. absorbs a quantum of energyabsorbs a quantum of energy

d.d. moves closer to the nucleusmoves closer to the nucleus

The shape (not the size) of an The shape (not the size) of an electron cloud is determined by electron cloud is determined by

the electron's ____.the electron's ____.a.a. energy sublevelenergy sublevel

c.c. speedspeedb.b. positionposition

d.d. principal quantum numberprincipal quantum number

The letter "The letter "pp" in the symbol 4" in the symbol 4pp indicates the ____.indicates the ____.

spin of an electronspin of an electron c.c.principle energy levelprinciple energy level

orbital shapeorbital shapespeed of an electronspeed of an electron

What types of atomic orbitals are What types of atomic orbitals are in the third principal energy level?in the third principal energy level?

a.a. ss and and pp only onlyc.c. s, p, s, p, and and dd only only

b.b. pp and and dd only onlyd.d. s, p, d, s, p, d, and and ff

According to the aufbau principle, According to the aufbau principle, ____.____.

a.a. an orbital may be occupied by an orbital may be occupied by only two electronsonly two electrons

b.b. electrons in the same orbital must electrons in the same orbital must have opposite spinshave opposite spins

c.c. electrons enter orbitals of highest electrons enter orbitals of highest energy firstenergy first

d.d. electrons enter orbitals of lowest electrons enter orbitals of lowest energy firstenergy first

What is the number of electrons in What is the number of electrons in the outermost energy level of an the outermost energy level of an

oxygen atom?oxygen atom?a.a. 22 c.c. 66b.b. 44 d.d. 88

If three electrons are available to fill If three electrons are available to fill three empty 2three empty 2pp atomic orbitals, how atomic orbitals, how

will the electrons be distributed in the will the electrons be distributed in the three orbitals?three orbitals?

a.a. one electron in each orbitalone electron in each orbitalb.b. two electrons in one orbital, one two electrons in one orbital, one

in another, none in the thirdin another, none in the thirdc.c. three in one orbital, none in the three in one orbital, none in the

other twoother twod.d. Three electrons cannot fill three Three electrons cannot fill three

empty 2empty 2pp atomic orbitals. atomic orbitals.

How many unpaired electrons are How many unpaired electrons are in a sulfur atom (atomic number in a sulfur atom (atomic number

16)?16)?a.a. 00 c.c. 22b.b. 11 d.d. 33

How many half-filled orbitals are How many half-filled orbitals are in a bromine atom?in a bromine atom?

a.a. 11 c.c. 33b.b. 22 d.d. 44

Stable electron configurations are Stable electron configurations are likely to contain ____.likely to contain ____.

a.a. filled energy sublevelsfilled energy sublevelsb.b. fewer electrons than unstable fewer electrons than unstable

configurationsconfigurationsc.c. unfilled unfilled ss orbitals orbitals

d.d. electrons with a clockwise spinelectrons with a clockwise spin

Which electron configuration of Which electron configuration of the 4the 4ff energy sublevel is the most energy sublevel is the most

stable?stable?a.a. 44ff66

c.c. 4 4ff77 b.b. 4 4ff1010

d.d. 4 4ff1414

Which of the following electron Which of the following electron configurations of outer sublevels configurations of outer sublevels

is the most stable?is the most stable?a.a. 44dd5555ss11

c.c. 44dd9955ss22

b.b. 44dd5555ss22

d.d. 44dd9955ss11

The quantum mechanical model of The quantum mechanical model of the atom ____.the atom ____.

a.a. defines the exact path of an defines the exact path of an electron around the nucleuselectron around the nucleus

b.b. was proposed by Niels Bohrwas proposed by Niels Bohrc.c. involves the probability of finding involves the probability of finding

an electron in a certain positionan electron in a certain positiond.d. has many analogies in the visible has many analogies in the visible

worldworld

According to the Heisenberg According to the Heisenberg uncertainty principle, if the uncertainty principle, if the

position of a moving particle is position of a moving particle is known, what other quantity known, what other quantity

CANNOT be known?CANNOT be known?a.a. massmass c.c. spinspin

b.b. chargecharge d.d. velocityvelocity

What is another name for the What is another name for the representative elements?representative elements?

a.a. Group A elementsGroup A elementsc.c. Group C elementsGroup C elementsb.b. Group B elementsGroup B elements

d.d. transition elementstransition elements

Each period in the periodic table Each period in the periodic table corresponds to ____.corresponds to ____.

a.a. a principal energy levela principal energy levelc.c. an orbitalan orbital

b.b. an energy sublevelan energy subleveld.d. a suborbitala suborbital

The modern periodic table is The modern periodic table is arranged in order of increasing arranged in order of increasing

atomic ____.atomic ____.a.a. massmass

c.c. numbernumberb.b. chargecharged.d. radiusradius

Who arranged the elements Who arranged the elements according to atomic mass and used according to atomic mass and used

the arrangement to predict the the arrangement to predict the properties of missing elements?properties of missing elements?

a.a. Henry MoseleyHenry Moseleyc.c. John DaltonJohn Dalton

b.b. Antoine LavoisierAntoine Lavoisierd.d. Dmitri MendeleevDmitri Mendeleev

Which of the following electron Which of the following electron configurations is most likely to result configurations is most likely to result

in an element that is relatively in an element that is relatively inactive?inactive?

a.a. a half-filled energy sublevela half-filled energy sublevelb.b. a filled energy sublevela filled energy sublevel

c.c. one empty and one filled energy one empty and one filled energy sublevelsublevel

d.d. a filled highest occupied principal a filled highest occupied principal energy levelenergy level

Which of the following statements is Which of the following statements is true about ions?true about ions?

a.a. Cations form when an atom gains Cations form when an atom gains electrons.electrons.

b.b. Cations form when an atom loses Cations form when an atom loses electrons.electrons.

c.c. Anions form when an atom gains Anions form when an atom gains protons.protons.

d.d. Anions form when an atom loses Anions form when an atom loses protons.protons.