ACS Chemistry general Exam With
Detailed Questions And Correct
Answers||Latest Exam 2026-
2027||Already Graded A+
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
Detailed Questions And Correct
Answers||Latest Exam 2026-
2027||Already Graded A+
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
