Ion Definition and 382 Threads

Question: State the hybridization used and the molecular geometry shape of hydroxide ion, OH-. Okay, so I draw out the Lewis structure, where there are 6 electrons (3 lone pairs) around the O atom, which is bonded to the H atom. So, I think base on the 3 nonbonding domains and 1 bonding...

Titanium 2+ Ion. Is it [Ar]3d^04s^2 or [Ar]3d^24s^0 I'd assume it's the former (looks more energy efficient).

I know what the formal definition of ph is, and I am comfortable with logarithms, anti-logs, and the laws of exponents. Still, I get confused doing actual calculations and would greatly appreciate your input on the following: Suppose something has a ph of 3.5-How do you calculate the hydrogen...

How is this microscope going to be way way better than the electron microscope? Does anyone know the significance of this piece of equipment? Website links would also be nice... thanks

i have had an idea for a few years and am finally starting to go forward with it.. i need to know if it is possible to build an ion propulsion unit at home. being that it is on the Earth and not in space does it need a defuser? can it be made to run on 110v? i don't need it huge to start. i just...

wish for "simple + beginner" explanation for atom, ion and particles and their relationship. thank you.

I'm trying to find the mass of an unknown ion and I think the equation I'm down to to find the mass only requires me to determine the velocity before I can calculate mass -- but I don't know how. Could anyone help me out and direct me to an equation(s) that would help me find the velocity of...

The equilibrium constants are given for the following salts MgCO3 = 6.8x10-6 CaCO3 = 5.0x10-9 BaCO3 = 2.6x10-9 What is the name of the salt that will produce the lowest concentration of carbonate ion in solution? Write the name not the chemical formula. Is it barium carbonate?? Is...

http://www.physorg.com/news9786.html :smile:

Question goes as follows: "In an ionised gas there are positive ions and electrones moving around in collision with molecules of the gas. Calculate the ratio of the mean free path of the electrons in the gas to the mean free path of the positive ions in the gas." As far as I can see I...

I'm trying to understand the nucleophilicity of alkynes, my book lists the pKa's of acetylene (HCCH), ethylene (CH2CH2), and methane (CH3CH3) as 25, 44, and 50 respectively. This leads to the conclusion that HCCH -acetylene- is the strongest acid and hence the weakest base. The book then goes...

Hi, I have yet another problem with this diffraction thing. I have little clue on these questions: e) The radius of the O^2- ion is assumed to be 0.126 nm. By x-ray diffraction experiments the dimensions of the unit cells for MgO, CaO, SrO and BaO has been determined to be 0.4213 nm...

Currently in my Chemsitry class we are reviewing these ions. Since these ions are formed of perfectly neutral elements, how can they have a charge as a whole. My teacher told me these charges in the anions can be attributed to an incomplete oxygen bond such as the negative 2 charge in carbonate(...

When I stick some Copper (II) Sulfate * Pentahyrate into the blue flame of my butane torch, it turns green. When I crush the tiny CuSO4 crystals up into a finer powder and mix them with a mixture of KClO3 and Sugar, then light that on fire, I get a very blue flame. What is happening here? I...

How would one test distilled water for sulfate ions?

Why is Mn^+ more paramagnetic than N,S,Fe^+,Cr^{+2} I guess the answer would be "because it has 6 unpaired electrons" but why is that? How could I tell in advance that the one electron removed from Mn was the paired one in 4s orbital and not one of the unpaired in 3d? The Energy of 3d is...

I don't know much about science, but I got a problem on my math homework that says "find the total charge. then decide whether you have an atom or an ion". Sodium:Electrons-10 Protons-11 Total Charge-? Atom or Ion?-? Sodium:Electrons-11...

I meet a problem about "ion sputtering "in my work,I want to acquire some knowledge about "ion sputtering ",who can tell me where can i find relative articles? THANKS!

Li Ion battery "recharges in one minute" http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=159907938 big potential... :rolleyes:

Mercury can form Hg2+2 and Hg+2 ions. Why does mercury form Hg2+2? Are there any other "diatomic ions" like this? I assume this has to do with atomic size, but why don't zinc and cadmium behave like this? They only form Zn+2 and Cd+2.

Ok, an ion experiences a magnetic force of 6.2X10^-16 N when moving in the positive x direction, but no force when moving in the positive y direction. What is the magnitude of magnetic force exerted on the ion when it moves in the x-y plane along the line x=y? Assume the ions speed is the same...

Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion (K+) channel carries a current of 1.8 pA. How many potassium ions pass through if the ion channel opens for 1.0 ms? What is the current density in the ion channel? I am completely lost for this one...

I know that Einstein dedicated the end of his life working on this topic. Do anybody knows what exactly did his theory was about, and if it is connected somehow with modern unified therories? Thanks.

Has arrived, eventually. http://www.sci.esa.int/science-e/www/area/index.cfm?fareaid=10 propulsion details here:http://www.sci.esa.int/science-e/www/object/index.cfm?fobjectid=34201

Hey ppl, I was wondering, with a singly ionised He atom, can we apply the Bohr model, eg E = 13.6eV/n^2, to find the energy of the excited states? How would i go about that?

I understand that with an ionic acid (when in solution), either the +ve ion OR the -ve ion can be the proton donor. Are there any ways to tell which ion does the donating by just looking at the chemical structure of the acid? I'd appreciate if someone could point me in the direction of an...

I am doing a high level three year course in which I pick a science topic and do research on it. I will have the privilege of working with scientists and professors from several universities and laboratories and for this course I get 12 college credits, plus one high school credit for each of...

A Fe+ ion is traveling at 200 m/sec in a direction 20 deg south of west at a point. The magnetic field at that point is 0.4 T directed at 10 deg west of south. What is the instantaneous magnetic force that acts on the Fe is how many Newtons?

ION Drives are relatively new technologys, and have been used for small un-manned missions to comets and stuff, however, there incredibly weak (0.2N thrust from what i have read). Does this teachnology have the potential to accelerate something like a 5 tonne manned ship at 10m/s ? I have...

Hi people. I am asking this for a friend, and he's not here right now, so I'm doing my best to remember exactly what it was that he was looking for, but I know that he is looking for something which is soluble, and I think he said Metal Ion, which is non-toxic etc, that can be used to make...

Why is it that sometimes ligands that surround a transition metal ion form a square planar arrangement? Surely the best thing to do (according to electron pair repulsion theory) would be to form a tetrahedral arrangement. I have heard that complex ions with Nickel as the transition metal...

Boron ion battery?? If B[11] reacts with a neutron, it yields one atom of C[12] and one atom of N. The Earth is constantly being bombarded by neutrons. Could a battery be developed to exploit the neutrons?