March 28, 2024, 02:11:56 PM
Forum Rules: Read This Before Posting


Topic: AP test  (Read 223340 times)

0 Members and 1 Guest are viewing this topic.

Offline tennis freak

  • Full Member
  • ****
  • Posts: 107
  • Mole Snacks: +10/-9
Re: AP test
« Reply #270 on: May 18, 2006, 03:34:30 PM »
yay only 27 more post till i have 100 ::) why do you care so much ???
AP Chemistry Squad Member [004]

Don't be afraid to try something new, remember amateurs built the ark and professionals built the titanic!

jcamry

  • Guest
Re: AP test
« Reply #271 on: May 18, 2006, 08:12:37 PM »
I am retarded at chemistry i need help

jcamry

  • Guest
Re: AP test
« Reply #272 on: May 18, 2006, 08:16:19 PM »
 ionization enery. wtf?

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #273 on: May 18, 2006, 08:18:45 PM »
the energy required to change the element to an ion, the energy it takes to "steal" an electron from an atom.
AP Chemistry Squad Member [001]

jcamry

  • Guest
Re: AP test
« Reply #274 on: May 18, 2006, 08:22:37 PM »
ok cool man. this is a bonding question. what is an easy way to figure out the shape of the bonds?

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #275 on: May 18, 2006, 08:24:10 PM »
what do you mean? you mean straight or bent or tetrahedral?
AP Chemistry Squad Member [001]

jcamry

  • Guest
Re: AP test
« Reply #276 on: May 18, 2006, 08:25:04 PM »
yeah, yeah!!

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #277 on: May 18, 2006, 08:26:03 PM »
drawing the lewis structure actually works well. remember the nonbonded pairs of electrons.
AP Chemistry Squad Member [001]

jcamry

  • Guest
Re: AP test
« Reply #278 on: May 18, 2006, 08:27:45 PM »
do you just take the lewis dot structure and the amount of sides is the shape? kinda, sorta?

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #279 on: May 18, 2006, 08:30:02 PM »
yeah, but you have to remember the VSEPR theory. nonbonded pairs take up more space than atoms do. that's why water's shape is "bent." you guys don't have those model kits where you build the molecules? those help a lot.
AP Chemistry Squad Member [001]

jcamry

  • Guest
Re: AP test
« Reply #280 on: May 18, 2006, 08:32:06 PM »
so if a central atom has say nonbonded pairs on the top, then the other pairs are pushed down?

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #281 on: May 18, 2006, 08:34:50 PM »
then the other atoms are pushed down, that's why NH3 is trigonal pyramidal.
AP Chemistry Squad Member [001]

jcamry

  • Guest
Re: AP test
« Reply #282 on: May 18, 2006, 08:36:53 PM »
thanks man. i wont ask u anymore questions. i know u have to get going.

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #283 on: May 18, 2006, 08:38:10 PM »
you can ask more questions, i can answer them when i get back, either that or if you want to go that's cool too, also, you can post in teh high school forum and they will answer you stuff too.
AP Chemistry Squad Member [001]

Offline Will

  • Organic Dude
  • Chemist
  • Full Member
  • *
  • Posts: 400
  • Mole Snacks: +58/-2
  • Gender: Male
Re: AP test
« Reply #284 on: May 19, 2006, 01:41:18 PM »
the energy required to change the element to an ion, the energy it takes to "steal" an electron from an atom.

I was taught that the ionization energy is the minimum energy required to remove one electron from each atom in one mole of gaseous atoms of that element at 298K and 1 atm.

yeah, but you have to remember the VSEPR theory.
Except in cases like PH3. YOu have to think about the sizes of the orbitals of the orbitals involved in bonding etc.

Sponsored Links