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CHEM 121 FINAL EXAM |
UPDATED QUESTIONS AND
ANSWERS UPDATED - PORTAGE
LEARNING
Question : What are the different levels of energy?
CORRECT ANSWER: : 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s
Question : How do you convert Celsius to Fahrenheit?
CORRECT ANSWER: : Fahrenheit = (Celsius x 9/5) + 32
Question : How do you convert Fahrenheit to Celsius?
CORRECT ANSWER: : Celsius = (Fahrenheit - 32) x 5/9
Question : How do you convert Celsius to Kelvin?
CORRECT ANSWER: : Kelvin = Celsius + 273.15
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Question : How do you convert Kelvin to Celsius?
CORRECT ANSWER: : Celsius = Kelvin - 273.15
Question : How do you convert Fahrenheit to Kelvin?
CORRECT ANSWER: : Kelvin = (Fahrenheit + 459.67) x 5/9
Question : How do you convert Kelvin to Fahrenheit?
CORRECT ANSWER: : Fahrenheit = (Kelvin x 9/5) -
459.67
Question : What is Hess's Law?
CORRECT ANSWER: : When reactants are converted to products,the enthalpy of the reaction is the same, no matter if it occurs in one step, or a series of steps.
Question : What is the Pauli Exclusion Principle?
CORRECT ANSWER: : 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
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the same 4 q.n.'s. The primary quantum number n tells you which of the main energy levels you are in.
Question : What is the principle of quantum number n?
CORRECT ANSWER: : Describes the distance of the orbital from the nucleus. The larger the value the larger the distance of the electron.
Question : What is the magnetic quantum number ml?
CORRECT ANSWER: : Tells us the 3D orientation of the orbital in space.
Question : What is the electron spin quantum number ms?
CORRECT ANSWER: : Tells us the spin direction of the electron, +1/2 or -1/2
Question : What is the angular momentum quantum
number l?CORRECT ANSWER:: This tells us the shape.
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Question : Which areas of the periodic table belong to
which orbital?CORRECT ANSWER: : Groups 1 & 2 & Helium = sGroups 3 through 12 = dGroups 13 through 18 (not He) = p
Question : What happens in terms of reactions throughout
the periodic table?CORRECT ANSWER: : The reactions are more vigorous as we go down, like in Group 1.
Question : What are the reactive characteristics of group 7
- halogens?
CORRECT ANSWER: : They are all very reactive because of their 7 valance electrons. They have very high ionization energies & electron affinities. Fluorine is very reactive and known as the tiger of chemistry. The reactivity is the opposite as the rest. It decreases as it goes down.