Chem 161 - Study guides, Class notes & Summaries

What is the threshold frequency? v0 = if you vary the frequency of the incident light, it is found that there is a certain minimum threshold frequency below which no electrons are emitted What happens if you are below the threshold frequency? No electrons are emitted regardless of the brightness of the light

What are the SI Base Units? length (meter); Mass (kilogram); time (seconds); temperature (kelvin); amount of a substance (mole); electric current (ampere); luminous intensity (candela) What’s the SI Base Unit for length? meter

What is a mole? number of atoms that has a mass equal to the AMU in grams What is Avogadro’s number? 6.022 x 10^23 atoms/mole What is wavelength? distance between each wave unit λ

What is ionic lattice? An ionic lattice is a long-range array of positive and negative ions, held together by electrostatic attraction What is ionic lattice measured in? kJ/mol

What are the four quantum values? n is the principal quantum number. It determines the main energy level. Values of n are 1,2,3,4,5,…… ℓ is the angular momentum quantum number. It determines the shape of the orbital Values of ℓ vary from 0 to n-1 mℓ is the magnetic quantum number. It determines the orientation of the orbital. Values of mℓ vary from -ℓ to +ℓ

What is ionization energy? Ionization energy is defined as the energy required to remove an electron from a gaseous atom. What is the formula for ionization energy? X (g) + energy –> E+(g) + e

Chem 161 Final Exam Questions And Answers 100% Correct

Chem 161 Lecture 2 100% Correct Questions And Answers

An element belonging to the halogen family would be expected to have a ________ ionization energy and a ________ electron affinity. - large; large What is the most likely charge on an ion formed by an element with a valence electron configuration of ns2np1? - 3+ If an automobile gets 24.5 miles to the gallon and the cost of gasoline is $2.75 a gallon, how much will it cost to drive 975 km? - 68.0 $ An s-block element in the 5th Period is - Sr The maximum number of electrons in any ORBITAL...

CHEM 161 Lecture 1 Questions And Answers 100% Correct