ACS GENERAL CHEMISTRY // ACS
CHEMISTRY GENERAL EXAM
QUESTIONS AND ANSWERS 2024
Layout of an element (mass # & atomic #) - ANSWER-
Forms of the same elements that differ in amount of neutrons - ANSWER-
isotopes
When alpha particles were shot at a metal foil target, most passed through
without deflections, while others deflected at large angles. What did this
suggest to Rutherford? - ANSWER- that the atoms of the metal were
mostly empty space, while the nucleus consisted of most of the mass which
included highly condensed positive particles (which caused the deflection).
Electron Configuration - ANSWER-
electromagnetic spectrum - ANSWER- Greater wavelength = lower
frequency
greater frequency = shorter wavelength
Light Energy Formula - ANSWER-
,Periodic Table - ANSWER-
Electrons configuration rule that states electrons do not pair until they have
to. (put one electrons in each electron domain then pair up) - ANSWER-
Hund's rule
An experimental phenomena associated with atoms having unpaired
electrons - which states such substances are attracted to magnetic fields -
ANSWER- Paramagnetism
quantum numbers - ANSWER-
What do the 4 quantum numbers stand for? - ANSWER- n = energy level
l = (n-1)
ml -l to l
mn 1/2 or -1/2 (spin)
List the quantum numbers for the s, p, d, and f orbitals - ANSWER- s 1,0,0
p 2, 1, -1-0-1
d 3, 2, -2--1-0-1-2
f 4, 3 -3--2--1-0-1-2-3
What two subatomic particles have the most mass, but occupy very little of
the volume of an atom - ANSWER- protons and neutrons
Define Isoelectronic - ANSWER- Having the same amount of electrons
,How does a sodium ion differ from a sodium atom? - ANSWER- the sodium
ion has fewer electrons
two or more compounds with the same formula but a different arrangement
of atoms in the molecule and different properties - ANSWER- isomer
two or more different physical forms in which an element can exist.
Graphite, charcoal, and diamond are all ________ of carbon. - ANSWER-
allotropes
What did Millikan discover from his oil drop experiments? - ANSWER- the
magnitude of the charge on an electron
Periods vs Groups - ANSWER-
when an atom of an electropositive atom becomes an ion it..? - ANSWER-
becomes larger
Nearly all the mass in an atom is located _________ because both ______
& ______ are located there, and each of these particles have a mass larger
than the ______ - ANSWER- inside the nucleus
protons & neutrons
electron
Classify the following as an element, compound, or mixture. If it is a
mixture, decide if it is a homogeneous or heterogeneous mixture.
1 Sugar
, 2 Spaghetti Sauce
3 Phosphorus - ANSWER- 1 compound, not a mixture
2 mixture, heterogenous
3 element
Properties that do depend on the amount of matter present. - ANSWER-
extensive
Dz^2 orbital - ANSWER-
Dxy orbital - ANSWER-
Dx^2y^2 orbital - ANSWER-
List the shape, electron domain geometry, and predicted bond angle of a
molecule with 6 electron domains - ANSWER- Octahedral
90º
List the electron domain geometry & molecular geometry of a molecule with
4 electron domains (4 bonding 0 nonbonding) - ANSWER- electron domain
geometry: tetrahedral
molecular geometry: tetrahedral
List the electron domain geometry & molecular geometry of a molecule with
4 electron domains (3 bonding 1 nonbonding) - ANSWER- electron domain
geometry: tetrahedral
molecular geometry: trigonal pyramidal
CHEMISTRY GENERAL EXAM
QUESTIONS AND ANSWERS 2024
Layout of an element (mass # & atomic #) - ANSWER-
Forms of the same elements that differ in amount of neutrons - ANSWER-
isotopes
When alpha particles were shot at a metal foil target, most passed through
without deflections, while others deflected at large angles. What did this
suggest to Rutherford? - ANSWER- that the atoms of the metal were
mostly empty space, while the nucleus consisted of most of the mass which
included highly condensed positive particles (which caused the deflection).
Electron Configuration - ANSWER-
electromagnetic spectrum - ANSWER- Greater wavelength = lower
frequency
greater frequency = shorter wavelength
Light Energy Formula - ANSWER-
,Periodic Table - ANSWER-
Electrons configuration rule that states electrons do not pair until they have
to. (put one electrons in each electron domain then pair up) - ANSWER-
Hund's rule
An experimental phenomena associated with atoms having unpaired
electrons - which states such substances are attracted to magnetic fields -
ANSWER- Paramagnetism
quantum numbers - ANSWER-
What do the 4 quantum numbers stand for? - ANSWER- n = energy level
l = (n-1)
ml -l to l
mn 1/2 or -1/2 (spin)
List the quantum numbers for the s, p, d, and f orbitals - ANSWER- s 1,0,0
p 2, 1, -1-0-1
d 3, 2, -2--1-0-1-2
f 4, 3 -3--2--1-0-1-2-3
What two subatomic particles have the most mass, but occupy very little of
the volume of an atom - ANSWER- protons and neutrons
Define Isoelectronic - ANSWER- Having the same amount of electrons
,How does a sodium ion differ from a sodium atom? - ANSWER- the sodium
ion has fewer electrons
two or more compounds with the same formula but a different arrangement
of atoms in the molecule and different properties - ANSWER- isomer
two or more different physical forms in which an element can exist.
Graphite, charcoal, and diamond are all ________ of carbon. - ANSWER-
allotropes
What did Millikan discover from his oil drop experiments? - ANSWER- the
magnitude of the charge on an electron
Periods vs Groups - ANSWER-
when an atom of an electropositive atom becomes an ion it..? - ANSWER-
becomes larger
Nearly all the mass in an atom is located _________ because both ______
& ______ are located there, and each of these particles have a mass larger
than the ______ - ANSWER- inside the nucleus
protons & neutrons
electron
Classify the following as an element, compound, or mixture. If it is a
mixture, decide if it is a homogeneous or heterogeneous mixture.
1 Sugar
, 2 Spaghetti Sauce
3 Phosphorus - ANSWER- 1 compound, not a mixture
2 mixture, heterogenous
3 element
Properties that do depend on the amount of matter present. - ANSWER-
extensive
Dz^2 orbital - ANSWER-
Dxy orbital - ANSWER-
Dx^2y^2 orbital - ANSWER-
List the shape, electron domain geometry, and predicted bond angle of a
molecule with 6 electron domains - ANSWER- Octahedral
90º
List the electron domain geometry & molecular geometry of a molecule with
4 electron domains (4 bonding 0 nonbonding) - ANSWER- electron domain
geometry: tetrahedral
molecular geometry: tetrahedral
List the electron domain geometry & molecular geometry of a molecule with
4 electron domains (3 bonding 1 nonbonding) - ANSWER- electron domain
geometry: tetrahedral
molecular geometry: trigonal pyramidal
