CHEMISTRY COMMUNITY

CarinaVargas1J

Thank you for sharing it with us. It is helpful. (:

CarinaVargas1J

Want to hear a joke about Sodium Hypobromite?

NaBro

CarinaVargas1J

If a king farts

IS that a noble gas?

CarinaVargas1J

Well since both shapes are linear, they have bond angles of 180 degrees.

CarinaVargas1J

I agree with the others. It is better to draw the dots for lone pairs and a line for bonds.

CarinaVargas1J

Formal Charge= # of valence electrons on atom- lone pair electrons + # of bonds

CarinaVargas1J

Element by itself = 0 Monatomic Ion = ion charge Group 1A = always +1 Group 2A = always +2 Halogens= usually -1, positive with oxygen Hydrogen= +1 with nonmetals -1 with metals Oxygen= usually -2, -1 with peroxide ((H2O2) Fluoride = always -1 * I recommend you to watch Tyler DeWitt in Youtube if yo...

CarinaVargas1J

Yes, it is indeed asking for the most stable Lewis structure with a formal charge of zero (or in some cases, the closest to zero).

CarinaVargas1J

Cations are positive, which means the atom lost electrons.

Anions are negative, which means the atom gained electrons.

CarinaVargas1J

Calculating the formal charge is important because if it adds up to 0, then the Lewis structure is the most stable.

CarinaVargas1J

On Friday's lecture, Professor Lavelle said that there will be only questions from chapter 1 and 2.

CarinaVargas1J

Did anyone attend the 3:00-3:50 review session on Friday? If so, can anyone tell me exactly what they went over? Or if you can send pictures, that would be even better. Thanks in advance (:

CarinaVargas1J

All electrons that have the same value for n (the principle quantum number) are in the same shell Within a shell (same n), all electrons that share the same l (the angular momentum quantum number, or orbital shape) are in the same sub-shell When electrons share the same n, l, and ml, we say they are...

CarinaVargas1J

Molar mass is expressed as M and the units are g/mol

CarinaVargas1J

Reactant and reagent are often used interchangeably—however, a reactant is more specifically a substance consumed in the course of a chemical reaction.

CarinaVargas1J

It will become Mg(N6). Then you are able to balance the rest of the equation.

CarinaVargas1J

I think significant figures don't matter too much as long as you have the correct answer. And if it does for tests, they will not deduct too many points.

CarinaVargas1J

I personally like to write the total number of each atom on both the reactant and product side on the bottom of the given equation so it can be easier for me to visualize it better. Then, I use the guess and check method & use coefficients that will make the equation balanced.

CarinaVargas1J

I also believe the cover sheet that was on our first test will be the formulas provided to us for the next tests we will take.

CarinaVargas1J

I am going to start going to step-up/workshops this upcoming week. For those who have already gone, how have you guys liked it?

CHEMISTRY COMMUNITY

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Re: Helpful Chart

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Re: homework problem 4.17 [ENDORSED]

Re: Lone pair electrons

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Re: cation vs anion

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Re: Midterm Topics [ENDORSED]

Friday's Review Session

Re: Difference between a shell, subshell, and orbital

Re: What is the notation for molar mass?

Re: Reactant vs. Reagent [ENDORSED]

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