Timeline for If all bond angles in AX₃ are the same, then which of the following are correct conclusions about AX₃?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 9, 2021 at 13:38 | answer | added | Aathesh Vigram | timeline score: 1 | |
| Jun 10, 2020 at 14:04 | history | edited | CommunityBot |
Commonmark migration
|
|
| Mar 13, 2020 at 15:27 | comment | added | Todd Minehardt | You're right, I'm wrong. Anyway, find a counterexample and there you go. | |
| Mar 13, 2020 at 15:23 | comment | added | Techie5879 | @ToddMinehardt But how would that be disproving option (C)? I simply got that there are 6 valence electrons in the particular molecule of BH$_3$. How do I know that there isn't some molecule with 5 valence electrons possible? Because it says "at least". | |
| Mar 13, 2020 at 15:18 | comment | added | Todd Minehardt | Correct. And there you have disproved option (C), which leaves you with (D). This approach to problem-solving - find a counterexample to inform you yes/no - is generally useful for multiple choice questions such as this. | |
| Mar 13, 2020 at 15:15 | comment | added | Techie5879 | @ToddMinehardt Boron having 3 valence electrons and 3 electrons, 1 for each in hydrogen would make the molecule have 6 valence electrons wouldn't it? | |
| Mar 13, 2020 at 15:12 | comment | added | Todd Minehardt | Yes, it is polar. As for option (C) - it's unclear to me and I think it's poorly-worded - all you need to do to disprove it is come up with one example of a molecule that has neither 5 valence electrons on the central atom or in the whole molecule. Maybe $\ce{BH3}$? | |
| Mar 13, 2020 at 15:02 | comment | added | Techie5879 | @ToddMinehardt Also, isn't NH$_3$ polar?? | |
| Mar 13, 2020 at 14:56 | comment | added | Techie5879 | @ToddMinehardt Yes I see that rules out (B). But what do we mean by the option (C)? What does it mean when it says that the valence electrons of AX$_3$ is 5? Is it referring to the central atom or the whole molecule's number of valence electrons? | |
| Mar 13, 2020 at 14:52 | comment | added | Todd Minehardt | Bond angles in $\ce{NH3}$ are equal, but the molecular structure is not planar. That's a good place to start. | |
| Mar 13, 2020 at 14:45 | history | edited | andselisk♦ | CC BY-SA 4.0 |
added 53 characters in body; edited tags; edited title
|
| Mar 13, 2020 at 14:42 | history | asked | Techie5879 | CC BY-SA 4.0 |