CHM101 Exam 1 (NEW 2025/ 2026 Update)
Introduction to General, Organic, and
Biochemistry Questions & Answers {Grade
A} 100% Correct (Verified Solutions)- GCU
Marie Curie - correct answer Discovered radioactivity (the emission of small energetic
particles from the core of certain unstable atoms) at the end of the 19th century.
Provided evidence of subatomic particles.
J.J Thomson - correct answer Constructed a glass tube called a cathode ray that was
partially evacuated and then applied a high electrical voltage between two electrodes
at either end of the tube. Thomson found that a beam of particles, called cathode
rays, traveled from the neg side to the pos side. J.J. Thomson measured the charge-
to-mass ratio of the cathode ray particlesy by deflecting them using electric and
magnetic fields. J.J. Thomson had discovered the electron.
Milliken's Oil Drop Experiment - correct answer Determined the charge of the
electron and used it to figure out the weight of an electron using J.J. Thomson's
charge-to-mass ratio. Sprayed neg charged oil into small droplets into a evacuated
container. As the droplets came across the positive plate and went down the hole in
the center of the plate they would be held still between the pos and neg plates.
Rutherford's Gold Foil Experiment - correct answer Indicated that particles of atoms
are mostly empty space (why most of them went through) but also that the nucleus
(of the gold) was small and positively charged (deflected some particles).
,CHM101 Exam 1 (NEW 2025/ 2026 Update)
Introduction to General, Organic, and
Biochemistry Questions & Answers {Grade
A} 100% Correct (Verified Solutions)- GCU
Average Atomic Mass - correct answer Average of the natural occuring isotopes
found in nature. Problems will be given with a variety of isotopes and their mass in
amu and percent of natural abundance. Convert the percent of natural abundacne
into decimal form by dividing by 100. Multiply that number by the amu given and
add all of the isotopes together.
Ions and the Periodic Table - correct answer A main-group metal tends to lose
electrons, forming a cation with the same number of electrons as the nearest noble
gas.
-Charge -1: He⁻, F⁻, Cl⁻, Br⁻, I⁻
-Charge -2: O²⁻, S²⁻, Se²⁻, Te²⁻
-Charge -3: N³⁻
A main-group nonmetal tends to gain electrons, forming an anion with the same
number of electrons as the nearest noble gas
-Charge +1: H⁺, Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺
-Charge +2: Mg²⁺, Ca²⁺, Sr²⁺, Ba²⁺
Avogadro's Number - correct answer 1 mole = 6.02214 x 10²³ of anything
, CHM101 Exam 1 (NEW 2025/ 2026 Update)
Introduction to General, Organic, and
Biochemistry Questions & Answers {Grade
A} 100% Correct (Verified Solutions)- GCU
Molecular to Empirical Formula - correct answer Divide the subscripts by the greatest
common factor
Naming Binary Ionic Compounds (form only 1 type cation) - correct answer Name of
cation (metal) --> name of the base anion (nonmetal) + -ide
Naming Binary Ionic Compounds (form more than 1 cation) - correct answer Name of
cation (metal) --> charge of the cation (metal) in roman numerals and parenthesis --
> name of the base anion + -ide
Acetate - correct answer C₂H₃O₂⁻
Carbonate - correct answer CO₃⁻
Hydrogen carbonate (bicarbonate) - correct answer HCO₃⁻
Hydroxide - correct answer OH⁻
Nitrite - correct answer NO₂⁻
Nitrate - correct answer NO₃⁻
Introduction to General, Organic, and
Biochemistry Questions & Answers {Grade
A} 100% Correct (Verified Solutions)- GCU
Marie Curie - correct answer Discovered radioactivity (the emission of small energetic
particles from the core of certain unstable atoms) at the end of the 19th century.
Provided evidence of subatomic particles.
J.J Thomson - correct answer Constructed a glass tube called a cathode ray that was
partially evacuated and then applied a high electrical voltage between two electrodes
at either end of the tube. Thomson found that a beam of particles, called cathode
rays, traveled from the neg side to the pos side. J.J. Thomson measured the charge-
to-mass ratio of the cathode ray particlesy by deflecting them using electric and
magnetic fields. J.J. Thomson had discovered the electron.
Milliken's Oil Drop Experiment - correct answer Determined the charge of the
electron and used it to figure out the weight of an electron using J.J. Thomson's
charge-to-mass ratio. Sprayed neg charged oil into small droplets into a evacuated
container. As the droplets came across the positive plate and went down the hole in
the center of the plate they would be held still between the pos and neg plates.
Rutherford's Gold Foil Experiment - correct answer Indicated that particles of atoms
are mostly empty space (why most of them went through) but also that the nucleus
(of the gold) was small and positively charged (deflected some particles).
,CHM101 Exam 1 (NEW 2025/ 2026 Update)
Introduction to General, Organic, and
Biochemistry Questions & Answers {Grade
A} 100% Correct (Verified Solutions)- GCU
Average Atomic Mass - correct answer Average of the natural occuring isotopes
found in nature. Problems will be given with a variety of isotopes and their mass in
amu and percent of natural abundance. Convert the percent of natural abundacne
into decimal form by dividing by 100. Multiply that number by the amu given and
add all of the isotopes together.
Ions and the Periodic Table - correct answer A main-group metal tends to lose
electrons, forming a cation with the same number of electrons as the nearest noble
gas.
-Charge -1: He⁻, F⁻, Cl⁻, Br⁻, I⁻
-Charge -2: O²⁻, S²⁻, Se²⁻, Te²⁻
-Charge -3: N³⁻
A main-group nonmetal tends to gain electrons, forming an anion with the same
number of electrons as the nearest noble gas
-Charge +1: H⁺, Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺
-Charge +2: Mg²⁺, Ca²⁺, Sr²⁺, Ba²⁺
Avogadro's Number - correct answer 1 mole = 6.02214 x 10²³ of anything
, CHM101 Exam 1 (NEW 2025/ 2026 Update)
Introduction to General, Organic, and
Biochemistry Questions & Answers {Grade
A} 100% Correct (Verified Solutions)- GCU
Molecular to Empirical Formula - correct answer Divide the subscripts by the greatest
common factor
Naming Binary Ionic Compounds (form only 1 type cation) - correct answer Name of
cation (metal) --> name of the base anion (nonmetal) + -ide
Naming Binary Ionic Compounds (form more than 1 cation) - correct answer Name of
cation (metal) --> charge of the cation (metal) in roman numerals and parenthesis --
> name of the base anion + -ide
Acetate - correct answer C₂H₃O₂⁻
Carbonate - correct answer CO₃⁻
Hydrogen carbonate (bicarbonate) - correct answer HCO₃⁻
Hydroxide - correct answer OH⁻
Nitrite - correct answer NO₂⁻
Nitrate - correct answer NO₃⁻
