Search found 18 matches
Search found 18 matches • Page 1 of 1
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....
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.
- Sat Nov 03, 2018 7:33 pm
- Forum: Lewis Structures
- Topic: Drawing Lewis Structures
- Replies: 14
- Views: 351
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.
- Sat Oct 27, 2018 8:02 pm
- Forum: Properties of Light
- Topic: Photoelectric Effect
- Replies: 8
- Views: 257
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.
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.
- Thu Oct 04, 2018 9:32 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Procedure
- Replies: 7
- Views: 210
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.
- Tue Oct 02, 2018 10:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Do we have to write out the question for homework?
- Replies: 4
- Views: 161
I'm writing down the entire equation for self-reference when it's time to study it again. Would highly recommend it!