ACS CHEMISTRY GENERAL EXAM QUESTIONS AND ANSWERS
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Layout of an element (mass # & atomic #) - CORRECT ANSWERS
atomic number = - CORRECT ANSWERS # of protons
mass number = - CORRECT ANSWERS # of protons + neutrons
the number of protons in a neutral atom will equal the - CORRECT ANSWERS # of
electrons
how to find the correct number of neutrons - CORRECT ANSWERS mass number -
atomic number
Forms of the same elements that differ in amount of neutrons - CORRECT ANSWERS
isotopes
What particle, if lost from the nucleus, would NOT cause a change in the atomic number? -
CORRECT ANSWERS a neutron because it has no charge
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? - CORRECT
ANSWERS 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).
An atom has a valence shell configuration of 1s1. To which group of elements on the periodic
table does it belong? - CORRECT ANSWERS IA
alkali metals
,ACS CHEMISTRY GENERAL EXAM QUESTIONS AND ANSWERS
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electromagnetic spectrum - CORRECT ANSWERS
The greater the wavelength of a photon..? - CORRECT ANSWERS the lower its
frequency
The greater the frequency of a photon...? - CORRECT ANSWERS the shorter its
wavelength
Light energy formula - CORRECT ANSWERS
What does C in the light energy formula represent? - CORRECT ANSWERS
Give the ground-state electron configuration of an atom in the second period - CORRECT
ANSWERS 1s2 2s1
Electrons configuration rule that states electrons do not pair until they have to. (put one
electrons in each electron domain then pair up) - CORRECT ANSWERS Hund's rule
An experimental phenomena associated with atoms having unpaired electrons - which states
such substances are attracted to magnetic fields - CORRECT ANSWERS Paramagnetism
Which drop in energy level results in the greatest emission of energy? - CORRECT
ANSWERS n=2 to n=1
quantum numbers - CORRECT ANSWERS
, ACS CHEMISTRY GENERAL EXAM QUESTIONS AND ANSWERS
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What do the 4 quantum numbers stand for? - CORRECT ANSWERS 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 - CORRECT ANSWERS 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
Py orbital - CORRECT ANSWERS
Which element is represented by X - CORRECT ANSWERS Chromium
What two subatomic particles have the most mass, but occupy very little of the volume of an
atom - CORRECT ANSWERS protons and neutrons
Define Isoelectronic - CORRECT ANSWERS Having the same amount of electrons
How does a sodium ion differ from a sodium atom? - CORRECT ANSWERS 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 - CORRECT ANSWERS isomer
LATEST DOWNLOADED 2025/2026 A COMPLETE SOLUTION
ALL ANSWERS 100% CORRECT DETAILED BEST GRADED TO
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Layout of an element (mass # & atomic #) - CORRECT ANSWERS
atomic number = - CORRECT ANSWERS # of protons
mass number = - CORRECT ANSWERS # of protons + neutrons
the number of protons in a neutral atom will equal the - CORRECT ANSWERS # of
electrons
how to find the correct number of neutrons - CORRECT ANSWERS mass number -
atomic number
Forms of the same elements that differ in amount of neutrons - CORRECT ANSWERS
isotopes
What particle, if lost from the nucleus, would NOT cause a change in the atomic number? -
CORRECT ANSWERS a neutron because it has no charge
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? - CORRECT
ANSWERS 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).
An atom has a valence shell configuration of 1s1. To which group of elements on the periodic
table does it belong? - CORRECT ANSWERS IA
alkali metals
,ACS CHEMISTRY GENERAL EXAM QUESTIONS AND ANSWERS
LATEST DOWNLOADED 2025/2026 A COMPLETE SOLUTION
ALL ANSWERS 100% CORRECT DETAILED BEST GRADED TO
SCORE A+ FOR PASS
electromagnetic spectrum - CORRECT ANSWERS
The greater the wavelength of a photon..? - CORRECT ANSWERS the lower its
frequency
The greater the frequency of a photon...? - CORRECT ANSWERS the shorter its
wavelength
Light energy formula - CORRECT ANSWERS
What does C in the light energy formula represent? - CORRECT ANSWERS
Give the ground-state electron configuration of an atom in the second period - CORRECT
ANSWERS 1s2 2s1
Electrons configuration rule that states electrons do not pair until they have to. (put one
electrons in each electron domain then pair up) - CORRECT ANSWERS Hund's rule
An experimental phenomena associated with atoms having unpaired electrons - which states
such substances are attracted to magnetic fields - CORRECT ANSWERS Paramagnetism
Which drop in energy level results in the greatest emission of energy? - CORRECT
ANSWERS n=2 to n=1
quantum numbers - CORRECT ANSWERS
, ACS CHEMISTRY GENERAL EXAM QUESTIONS AND ANSWERS
LATEST DOWNLOADED 2025/2026 A COMPLETE SOLUTION
ALL ANSWERS 100% CORRECT DETAILED BEST GRADED TO
SCORE A+ FOR PASS
What do the 4 quantum numbers stand for? - CORRECT ANSWERS 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 - CORRECT ANSWERS 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
Py orbital - CORRECT ANSWERS
Which element is represented by X - CORRECT ANSWERS Chromium
What two subatomic particles have the most mass, but occupy very little of the volume of an
atom - CORRECT ANSWERS protons and neutrons
Define Isoelectronic - CORRECT ANSWERS Having the same amount of electrons
How does a sodium ion differ from a sodium atom? - CORRECT ANSWERS 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 - CORRECT ANSWERS isomer
