Search found 9 matches
Search found 9 matches • Page 1 of 1
- Sun Nov 04, 2018 11:59 pm
- Forum: Trends in The Periodic Table
- Topic: Ranking of effects on Periodic trends
- Replies: 1
- Views: 35
I had the same question of overlapping trends, however I think if you take into account the strength of say the effective nuclear charge, as compared with the removal or addition of electrons it reveals itself.
- Sun Nov 04, 2018 11:56 pm
- Forum: Lewis Structures
- Topic: Steps for Lewis Structures
- Replies: 3
- Views: 27
Is it necessary to write formal charges at all times? Or only when explicitly told to do so? Also, for resonance structures is a hybrid resonance structure always expected if there are in fact delocalized double or triple bonds?
- Sun Nov 04, 2018 11:52 pm
- Forum: Ionic & Covalent Bonds
- Topic: electronegativity difference
- Replies: 4
- Views: 46
If the difference in electronegativity of a molecule falls between 2 and 1.5 would it be necessary to classify said bond as a covalent bond with ionic characteristics or would it simply be a covalent bond?
- Thu Oct 11, 2018 11:39 pm
- Forum: Significant Figures
- Topic: significant figures
- Replies: 5
- Views: 152
Lets say I'm multiplying a value like (225.099) times a constant such as the speed of light (3.00x10^8). Do I simply use three significant figures because of the constant?
- Fri Oct 05, 2018 8:47 am
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 68
- Views: 20065
The "formula units" phrasing throws me off a bit for a question where I am trying to find the "formula units of compound" in a certain amount of grams. Do I just set it up as conversion from grams to moles using molecular weight and solve for the moles of the compound as a whole?
I had the same problem of not knowing when scientific notation is actually required. More specifically if its neccesary to do all our work in this form or can I use decimals up until reaching the final solution?
Something that really helps me is having a piece of paper on which I have all the info regarding common ions, (name, symbols/formulas) to reference while studying and doing homework. Over time you'll become more familiarized the more you use them, but it helps to have that as a reiteration.