CHEMISTRY COMMUNITY

SummerLee1F

I wouldn’t necessarily write them out unless he asks for it on an exam. If you are doing it to check though, you can always do a short cut way, the equation would be number of valence electrons - sticks & dots. So the number of electrons of one element, minus the sticks and dots drawn around it....

SummerLee1F

Not curved, but if you get 250/500 points, you pass with a C-

SummerLee1F

Calculate number of valence electrons. The element with the smallest amount will always be center. Add them all up to draw the dots.

SummerLee1F

Typically, to draw the Lewis structure, you would need the total number of valence electrons, so what I do is write out each element’s valence electrons and the element with the smallest valence electron number is the center. Not sure how accurate my interpretation is, but that’s what I do for it.

SummerLee1F

Another tip, Lewis bases are almost always negatively charged. They can also be neutral charged.

SummerLee1F

annabel 1 1F wrote:How do we know how many resonance structures to draw?

You just draw all of the possibilities of each bond. Example, let’s say there’s two H’s and one O. One H & O have a double bond. For the second resonance structure, you would just draw the double bond on the other H instead of the first one.

SummerLee1F

The photoelectric effect is a measurement of how much kinetic energy (or electrons) is released when a photon hits a metal surface. It calculates threshold and if the frequency of the photon is large enough(meaning it is larger than the threshold) to release electrons.

SummerLee1F

If the particle has mass, it canNOT be faster than the speed of light. I believe lavelle said that in lecture.

SummerLee1F

I would recommend you do B and then BL. The 14A series is sort of meant to be a 2-year (6 quarter) series.

SummerLee1F

I believe the spectrum will be given to us...

SummerLee1F

Everything listed under outline 2 will be on test 2 (so basically everything from the end of test 1 until now).

SummerLee1F

One really easy way I learned to convert nanometers back to meters is to just take the sig figs and move the decimals to multiply by 10^-7. For example, 340 nanometers would be 3.40 x 10^-7m.

SummerLee1F

The syllabus under Quantum only has chapter one homework questions, so I would recommend you just do those.

SummerLee1F

It depends on who coordinates it, but you can ask homework questions and how clarification on how a certain process works.

SummerLee1F

I would use the equation Minitial x Vinital = Mfinal x Vfinal, based on the information we are given.

SummerLee1F

Do you guys know how to start a new question/topic? I can't seem to find the button for it

SummerLee1F

You cannot add "O" because you would essentially be inputting a different element that isn't actually produced in the chemical reaction. How I like to look at is that adding an extra "+ ___" is never okay.

SummerLee1F

I'm writing down the entire equation for self-reference when it's time to study it again. Would highly recommend it!

CHEMISTRY COMMUNITY

Search found 18 matches

Re: Formal charges

Re: curve?

Re: Lewis Structure

Re: The center atom

Re: Lewis Acids and Bases

Re: Drawing Lewis Structures

Re: Photoelectric Effect

Re: Speed of Light

Re: Winter quarter scheduling

Re: Do I have to memorize the spectrum?

Re: Test #2

Re: units

Re: Homework for Week 2

Re: Step-up program

Re: Molarity and Dilution

Re: How does grading for discussion posts work?

Re: Balancing Procedure

Re: Do we have to write out the question for homework?