Ions Definition and 332 Threads

Why do some polyatomic ions violate the octet rule? I'm trying to figure out the lewis diagrams of some ions by myself, and sometimes I see things like these: http://www.chemprofessor.com/bonding_files/image035.jpg [PLAIN][PLAIN]https://www2.bc.edu/~teeter/Courses/Phosphate.GIF These things...

The Question: - "Oxygen forms three separate ions. What are the names and formulae of the three ions?" Now I am familiar with the ion "Oxide" which is the Oxygen atom with a 2- (negative two) charge, but I cannot find any information on these other two, any help would be greatly appreciated...

How come polyatomic ions--for instance, sulfite and sulfate--have the same net charge?

Negative ions effect benefit on the body ? I saw many claim on the internet by company selling bracelet, necklace and insole that emit negative ion using volcanic ash,tourmaline or a mixture of many mineral. They claim negative ion research stating increase energy, deeper sleep, more...

How does tourmaline produce negative ions ? Where those negative ions come from ? I know that negative ions is simply atoms with 1 extra electron so where they come from ? I also know that volcanic ash also produce negative ion same question ?

why does the hydration energy decrease as the size of the ion increases? I want a logical reason... I already know that it is because the charge to size ratio decreases...

This question is regarding polyatomic ions and their charge. I have always been told that I have to memorize the charge of polyatomic ions. The question is whether I can determine by myself the charge of two atoms when they join together to form a polyatomic ion. For example Se and O can form...

Can we breed protactinium from thorium by hitting it with accelerated He ions?

Hello, in water NaCl break itself into positive and negative ions but i didn't understood how exactly works the electricity conductions... the negative ions go to positive so seen that they are negative shouldn't repel the flow of electricity causing no conduction? thanks!

The general expression for calculating net potential energy in ion is: PE (r) = A r^m + B r^n where A & B are proportionality constants. What exactly are these constants?? Could anyone point me to correct resources?? I'm new at this forum and very interested in learning physics.?

Homework Statement 19F- p+ = ? n = 10 e- = ? Mass number = ? ---------------- 137Ba2+ p+ = ? n = ? e- =? Homework Equations Are these (answers below in italics) correct?The Attempt at a Solution 19F- p+ = 9 n = 10 e- = 10 Mass number = 19 137Ba2+ p+ = 56 n = 81 e- = 54 Mass number = 137

Homework Statement What is the concentration of ____ ions in a ___ mol dm-3 solution of ___?Homework Equations mass/molar mass = number of moles volume/molar volume = number of moles Not sure what other equations... The Attempt at a Solution I'm not understanding how this works. I have...

Homework Statement a) 100 cm3 of 0.1 mol/dm3 of hydrochloric acid was added to 100 cm3 of 0.1 mol/dm3 of sodium hydroxide and a rise in temperature of 4 degrees was observed. If 200 cm3 of 0.1 mol/dm3 of hydrochloric acid and 200 cm3 of 0.1 mol/dm3 of sodium hydroxide were used, the rise in...

How to accelerate ions at home? I am really interested in accelerating some metal ions at home but don't really know where to start... I am willing to reach 30 keV... Is it even possible? Are there any alternative ways of doing this other than using accelerators? Many thanks for your...

Hi, I am interested to know if photoelectric effect happens in a "single atom" of say Iron which is in a vacum... ? if yes, what is the workfunction of Fe2+ ? If no what is the ionization energy of Fe2+ in eV? Thanks in advance.

Is it that correct to say that ions ina B-E condensate rotate at around 10^15 rpm? (don't know the exact english term for this, sorry).

Homework Statement MnO_4^{-} + 8H^{+} + 5e^{-} \rightleftharpoons Mn^{2+} + 4H_2O 1. Explain why the presence of an acid is necessary for aqueous permanganate ions to function as an oxidizing agent. 2. Give two reasons for the aqueous permanganate ions acting as an oxidizing agent in acidic...

I'm getting myself muddled up, and don't know how to work out what the 3-d structure of transition metel complex ions. For example, the compound [CoCl4] has a Cobalt +2 ion surrounded by four chloride ions. I've seen two different structures for it. One is tetrahedral, like methane, the other...

Hey all. Just a quick question. Would high speed positive ions in a vacuum create a magnetic field that would attract other positively charged particles? If so, why is that? I understand that moving charges creat magnetic fields, but I thought that in the absence of a conductor or opposite...

I'm currently trying to cram knowledge of the transition metals into my head for a chemistry final exam, although i have come across a stumbling block when reading about the 3 dimensional shapes that complex ions form. My textbooks say that complex ion with 4 coordination bonds will form a...

From what I know, different metal ions produce different colours. This is due to the fact that electrons jump to the next energy level when energy is absorbed but then released some of that energy back, producing different wavelengths and thus different colours. What I want to know is...

A gas composed of nuclear fuel is undergoing fission, producing fast moving positive ions that I wish to remove from the system by use of a magnetic mirror. What field strength is needed to ensure the fragments follow the trajectory I need, and not interact with the surrounding material?

Hey all. I'm trying to find more info on converting moving ions into electricity. AKA Direct Energy Conversion. Anyone know any good sources? I don't really understand how they do it yet, even after reading a few things I found on google.

Homework Statement Homework Equations How many Ca2+ ions are there in 0.05 moles of Ca(NO3)2? The Attempt at a Solution how do we calculate the number of ions?

My friend told me that he heard from a friend that it does. I think it's a bit of a wild concept, but is there some validity in there if not any?

First off, this isn't a homework problem, but something I am trying to figure out on my own. I figured there wasn't a better place in the forums to ask though. Homework Statement I'm trying to find the velocity of positive ions in a deuterium plasma that is heated to 15keV. Homework...

Homework Statement Find the magnitude of the electric force between a Na+ ion and a Cl- ion separated by .5 nm. Homework Equations |F| = (kQq)/r^2 The Attempt at a Solution So the problem I am having with this question is this: my first attempt at a solution was to designate |Q| =...

Metal ions in Pyrex--why? According to http://en.wikipedia.org/wiki/Pyrex#Composition" is composed of oxygen, silicon, calcium, and sodium. I've Google Scholared to no avail... Thanks!

Whenever I think of an ion I think of an atom that can generate electricity. Something powerful. I wonder, if an ionic state is a pretty rare state to be in that only happens under special, and mostly temporary conditions? Or, is my view of ions wrong?

Homework Statement The spectator ions in the precipitation equation Pb(NO3)2+ 2KI --> PbI2 + 2KNO3 are ________. Homework Equations The Attempt at a Solution I've been working through a lot of practice problems for next week's final exam, and I seem to be struggling with this...

Hi, Suppose there are two plasma cases, conditions are the same, except for the gases present: a-Oxygen b-Nitrogen Since the dissociation energy of nitrogen is higher than oxygen, what could be concluded from it? Could it be more energetic nitrogen ions than oxygen ions (because initially...

why do acids and bases dissociate into ions while in water?

Hey, [Co(NH3)4Cl2]Cl I don't understand how there isn't just one mole of Cl- ions formed when you dissolve one mole of the compound in water. The answer is '2 moles', but I don't see how :( Another example is [Co(NH3)4]Cl3 How many moles of ions are formed when 1 mole of this...

According to the Brønsted-Lowry definition, a base is a compound that can -keyword- accept H+, and an acid anything that can give H+.

2 Questions please hello. i need help to Understand how can i Write Empirical formula for Al or in general how to Write Empirical formula? 2)i also need help to Understand how can i know what Ion i will get from Ba and P ? i think for ba is will be Negative because there more...

Is there any method to compare the electronegativity of ions such as O-, N+, S-, O+?

Homework Statement In a hot star, a multiply ionized atom with a single remaining electron produces a series of spectral lines as described by the Bohr model. The series corresponds to electronic transitions that terminate in the same final state. The longest and shortest wavelengths of the...

Homework Statement Sodium carbonate is often added to laundry detergents to soften hard water and make the detergent more effective. Suppose that a particular detergent mixture is designed to soften hard water that is 3.8×10^−3 M in Ca2+ and 1.1×10^−3 M in Mg2+ and that the average capacity...

Homework Statement P3-, S2-, Mn7+ , Sc3+, and Ti4+ are isoelctronic ions. 1)Write the ground state noble gas configuration for each of these ions. 2)Which one of them would you expect to thave the smalles radius? 3)Rank then from smallest to largest. Homework Equations The...

Under what conditions and how will negative oxygen ions react with hydrogen and hydrocarbons (such as methane or gasoline)?Does it require some catalyst or should be burned together? What is a way to harness spare electrons from oxygen when water is formed?

Homework Statement When a reaction mixture with a total volume of 4 L that contains 9.99 g of solid CaSO4 was stoichiometrically produced as per the balanced equation with 2.50 L of aqueous Ca2+, what molarity (M) of Ca2+ was required? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s)...

First, let me say hello to everyone on the forums! A friend and I have converted a 36" CRT television into a HV source using its flyback transformer. We discharged the tube before taking anything else apart. We have the HV source attached to a thin wire, which causes the air around it to...

Hi All, What are the average distance of a ion and a water molecule when it is hydrated. 1/ for sodium? 2/ potassium? Thanks.

My coursework is ruined, but I am not asking for help with my coursework. Does anyone know if there is a ion with a charge of +4. I might not be making sense. I know about Copper Chloride (CuCl+2) and Silver Nitrate (AgNO3+1) and Iron III Chloride (FeCl+3). Does anyone know of a plus 4? I...

I've been making solutions of silver ions by hooking 20-30V up to 2 silver electrodes in distilled water and noticed something interesting. The solution starts off as clear and by adding a bit of NaCl, AgCl precipitates out so there's definitely Ag+ ions in there. If I leave the solution for a...

Hi, my names Adam, this is my first post I am in year 10 UK (10th grade i believe) This is not a homework question, its advice towards the analysis of my chemistry coursework. Im predicted an A* in chemistry so this is why my experiment is more complicated than others in my class.I based my...

The average energy needed to produce an ion in air is 34eV, how many ions pair will be produced in air by a radiation of 1MeV, my teacher told me it is about 30,000 ions and electrons but can someone please prove it??:confused:

I know that moving charges produce a magnetic field, my question is if a solution of water containing ions moving through a pipe or being spun would produce a noticeable magnetic field. Would current running through a solution of ions produce a magnetic field as well? Thanks in advance

Hello; I was told today that you can get two different types of carbon ion, C4+ and C4-. My question is, how are they any different? What is the difference between the two ions that causes the reverse of charge? Thanks.

1. Fluorine compounds are added to water, the concentration being 0.90 ppm. a. What amount of fluoride present 1.0g of water? Solution- (just need to know what the number mean) Divided 0.90 pm by 1,000,000, which I assume is the grams of substance per kilogram? Then divided that...