CHEM 121 FINAL EXAM WITH
CORRECT QUESTIONS AND
ANSWERS 2025
I. What are the different levels of energy? - CORRECT-ANSWERS
>>>>>>1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s
II. How do you convert Celsius to Fahrenheit? - CORRECT-ANSWERS
>>>>>>Fahrenheit = (Celsius x 9/5) + 32
III. How do you convert Fahrenheit to Celsius? - CORRECT-ANSWERS
>>>>>>Celsius = (Fahrenheit - 32) x 5/9
IV. How do you convert Celsius to Kelvin? - CORRECT-ANSWERS
>>>>>>Kelvin = Celsius + 273.15
V. How do you convert Kelvin to Celsius? - CORRECT-ANSWERS
>>>>>>Celsius = Kelvin - 273.15
VI. How do you convert Fahrenheit to Kelvin? - CORRECT-ANSWERS
>>>>>>Kelvin = (Fahrenheit + 459.67) x 5/9
VII. How do you convert Kelvin to Fahrenheit? - CORRECT-ANSWERS
>>>>>>Fahrenheit = (Kelvin x 9/5) - 459.67
VIII. What is Hess's Law? - CORRECT-ANSWERS >>>>>>When reactants
are converted to products,
IX. the enthalpy of the reaction is the same, no matter if it occurs in one
step, or a series of steps.
, X. What is the Pauli Exclusion Principle? - CORRECT-ANSWERS
>>>>>>Each electron has a set of 4 numbers, called quantum
numbers (q.n.'s.) that specify it completely. No two electrons in the
same atom can have the same 4 q.n.'s. The primary quantum number
n tells you which of the main energy levels you are in.
XI. What is the principle of quantum number n? - CORRECT-ANSWERS
>>>>>>Describes the distance of the orbital from the nucleus. The
larger the value the larger the distance of the electron.
XII. What is the magnetic quantum number ml? - CORRECT-ANSWERS
>>>>>>Tells us the 3D orientation of the orbital in space.
XIII. What is the electron spin quantum number ms? - CORRECT-ANSWERS
>>>>>>Tells us the spin direction of the electron, +1/2 or -1/2
XIV. What is the angular momentum quantum number l? - CORRECT-
ANSWERS >>>>>>This tells us the shape.
XV. Which areas of the periodic table belong to which orbital? - CORRECT-
ANSWERS >>>>>>Groups 1 & 2 & Helium = s
XVI. Groups 3 through 12 = d
XVII. Groups 13 through 18 (not He) = p
XVIII. What happens in terms of reactions throughout the periodic table? -
CORRECT-ANSWERS >>>>>>The reactions are more vigorous as we
go down, like in Group 1.
CORRECT QUESTIONS AND
ANSWERS 2025
I. What are the different levels of energy? - CORRECT-ANSWERS
>>>>>>1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s
II. How do you convert Celsius to Fahrenheit? - CORRECT-ANSWERS
>>>>>>Fahrenheit = (Celsius x 9/5) + 32
III. How do you convert Fahrenheit to Celsius? - CORRECT-ANSWERS
>>>>>>Celsius = (Fahrenheit - 32) x 5/9
IV. How do you convert Celsius to Kelvin? - CORRECT-ANSWERS
>>>>>>Kelvin = Celsius + 273.15
V. How do you convert Kelvin to Celsius? - CORRECT-ANSWERS
>>>>>>Celsius = Kelvin - 273.15
VI. How do you convert Fahrenheit to Kelvin? - CORRECT-ANSWERS
>>>>>>Kelvin = (Fahrenheit + 459.67) x 5/9
VII. How do you convert Kelvin to Fahrenheit? - CORRECT-ANSWERS
>>>>>>Fahrenheit = (Kelvin x 9/5) - 459.67
VIII. What is Hess's Law? - CORRECT-ANSWERS >>>>>>When reactants
are converted to products,
IX. the enthalpy of the reaction is the same, no matter if it occurs in one
step, or a series of steps.
, X. What is the Pauli Exclusion Principle? - CORRECT-ANSWERS
>>>>>>Each electron has a set of 4 numbers, called quantum
numbers (q.n.'s.) that specify it completely. No two electrons in the
same atom can have the same 4 q.n.'s. The primary quantum number
n tells you which of the main energy levels you are in.
XI. What is the principle of quantum number n? - CORRECT-ANSWERS
>>>>>>Describes the distance of the orbital from the nucleus. The
larger the value the larger the distance of the electron.
XII. What is the magnetic quantum number ml? - CORRECT-ANSWERS
>>>>>>Tells us the 3D orientation of the orbital in space.
XIII. What is the electron spin quantum number ms? - CORRECT-ANSWERS
>>>>>>Tells us the spin direction of the electron, +1/2 or -1/2
XIV. What is the angular momentum quantum number l? - CORRECT-
ANSWERS >>>>>>This tells us the shape.
XV. Which areas of the periodic table belong to which orbital? - CORRECT-
ANSWERS >>>>>>Groups 1 & 2 & Helium = s
XVI. Groups 3 through 12 = d
XVII. Groups 13 through 18 (not He) = p
XVIII. What happens in terms of reactions throughout the periodic table? -
CORRECT-ANSWERS >>>>>>The reactions are more vigorous as we
go down, like in Group 1.
