1
For Expert help and assignment solutions, +254707240657
ACS Chemistry general Exam Questions
and Answers (100% Correct Answers)
Already Graded A+
atomic number = [ ANS: ] # of protons
mass number = [ ANS: ] # of protons + neutrons
the number of protons in a neutral atom will equal the [ ANS: ] # of
electrons
© 2025 Assignment Expert
how to find the correct number of neutrons [ ANS: ] mass number -
atomic number
Forms of the same elements that differ in amount of neutrons [
Guru01 - Stuvia
ANS: ] isotopes
What particle, if lost from the nucleus, would NOT cause a change
in the atomic number? [ ANS: ] 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? [ ANS: ] 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? [ ANS: ] IA
alkali metals
The greater the wavelength of a photon..? [ ANS: ] the lower its
frequency
, 2
For Expert help and assignment solutions, +254707240657
The greater the frequency of a photon...? [ ANS: ] the shorter its
wavelength
Give the ground-state electron configuration of an atom in the
second period [ ANS: ] 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) [ ANS: ] Hund's rule
An experimental phenomena associated with atoms having
unpaired electrons - which states such substances are attracted
to magnetic fields [ ANS: ] Paramagnetism
© 2025 Assignment Expert
Which drop in energy level results in the greatest emission of
energy? [ ANS: ] n=2 to n=1
Guru01 - Stuvia
What do the 4 quantum numbers stand for? [ ANS: ] 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 [ ANS: ] 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
Which element is represented by X [ ANS: ] Chromium
What two subatomic particles have the most mass, but occupy
very little of the volume of an atom [ ANS: ] protons and neutrons
Define Isoelectronic [ ANS: ] Having the same amount of electrons
, 3
For Expert help and assignment solutions, +254707240657
How does a sodium ion differ from a sodium atom? [ ANS: ] 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 [
ANS: ] isomer
two or more different physical forms in which an element can
exist. Graphite, charcoal, and diamond are all ________ of carbon.
[ ANS: ] allotropes
What makes up an alpha particle? [ ANS: ] 2 protons and 2
neutrons
© 2025 Assignment Expert
What did Millikan discover from his oil drop experiments? [ ANS: ]
the magnitude of the charge on an electron
Guru01 - Stuvia
when an atom of an electropositive atom becomes an ion it..? [
ANS: ] 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 ______ [ ANS: ] 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 [ ANS: ] 1 compound, not a mixture
For Expert help and assignment solutions, +254707240657
ACS Chemistry general Exam Questions
and Answers (100% Correct Answers)
Already Graded A+
atomic number = [ ANS: ] # of protons
mass number = [ ANS: ] # of protons + neutrons
the number of protons in a neutral atom will equal the [ ANS: ] # of
electrons
© 2025 Assignment Expert
how to find the correct number of neutrons [ ANS: ] mass number -
atomic number
Forms of the same elements that differ in amount of neutrons [
Guru01 - Stuvia
ANS: ] isotopes
What particle, if lost from the nucleus, would NOT cause a change
in the atomic number? [ ANS: ] 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? [ ANS: ] 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? [ ANS: ] IA
alkali metals
The greater the wavelength of a photon..? [ ANS: ] the lower its
frequency
, 2
For Expert help and assignment solutions, +254707240657
The greater the frequency of a photon...? [ ANS: ] the shorter its
wavelength
Give the ground-state electron configuration of an atom in the
second period [ ANS: ] 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) [ ANS: ] Hund's rule
An experimental phenomena associated with atoms having
unpaired electrons - which states such substances are attracted
to magnetic fields [ ANS: ] Paramagnetism
© 2025 Assignment Expert
Which drop in energy level results in the greatest emission of
energy? [ ANS: ] n=2 to n=1
Guru01 - Stuvia
What do the 4 quantum numbers stand for? [ ANS: ] 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 [ ANS: ] 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
Which element is represented by X [ ANS: ] Chromium
What two subatomic particles have the most mass, but occupy
very little of the volume of an atom [ ANS: ] protons and neutrons
Define Isoelectronic [ ANS: ] Having the same amount of electrons
, 3
For Expert help and assignment solutions, +254707240657
How does a sodium ion differ from a sodium atom? [ ANS: ] 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 [
ANS: ] isomer
two or more different physical forms in which an element can
exist. Graphite, charcoal, and diamond are all ________ of carbon.
[ ANS: ] allotropes
What makes up an alpha particle? [ ANS: ] 2 protons and 2
neutrons
© 2025 Assignment Expert
What did Millikan discover from his oil drop experiments? [ ANS: ]
the magnitude of the charge on an electron
Guru01 - Stuvia
when an atom of an electropositive atom becomes an ion it..? [
ANS: ] 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 ______ [ ANS: ] 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 [ ANS: ] 1 compound, not a mixture
