wolfson

Well when you are taking about inert (or not), you must understand compounds (covalent) create inert gas stability, and ionic also (excluding transition metals), so back to transition metals, the best way to understand is by means that the s(orbitals) in d block elements are at lower energy states than the d subshells. As atoms always strive to be in states of lowest energy, s shells are filled up first. The copper and chromium exceptions - which have one electron in their outer orbital - do so because of electron repulsion. Sharing the electrons throughout the s and d orbitals gives lower energy states to the atoms than putting two electrons in the outer s orbital. Not all d block elements are transition metals. Scandium and zinc don't qualify, due to the chemical definition given above. Scandium has one electron in its d subshell, and 2 electrons in its outer s orbital. As scandium's only ion (Sc3+) has no electrons in its d orbital it is clear that it doesn't have a 'partially filled d orbital'. Similarly, zinc is not applicable because its only ion, Zn2+, has a full d orbital. So in all you need to remember is that Transition elements are chemically defined as elements which form at least one ion with a partially filled subshell of d electrons. If you need any more help on the periodic table of elements then just ask, i studied Chemistry so i should be able to help with your questions.

Ive conntected, the ethernet cables to the router, but i cant get the computer to connect together, im have troule trying to start the connection, anyone have any ideas please????

I am also trying to set up a internet sharing thingy, between my dsl computer and my other one, and im having trouble i have a 4-port cable/DSL Gateway router, and im trying to get it to work, and im having NO joy, do I : 1. Connect both computer using ethernet cables or 2.Connect them using the router??? When trying anything its just going wrong im c**p with computers, any help would be appreciated right now!!!!!!!!

Craig

Ty v v v much, and could you just explain the latter ty, im not very good at comanding my computer, ty.

Im looking for a program that will auto-update the files on my home network, i.e. on computer 1, i create a txt file, i would like computer 2 to auto-update its files and "take this one in" any help would be much appreciated. thank you.

Y^x = x^y The derivative of f(x) is f'(x) = (1 - ln(x)) / x^2, so that f'(x) = 0 gives x = e. From that we conclude that f(x) is increasing for 0<x<e and decreasing for x>e. For any integer n>4 the horizontal line y=f(n) is "lower" than the line y=f(2) and thus intersects the graph of f(x) as second time for some 1<x<2, so that there is no integer m with f(m)=f(n). When we started with x/ln(x) = y/ln(y), we restricted ourselves toPositive x and y (by definition of ln). But the original question does not exclude negative solutions. It is easy to show that there are no solutions with one positive and one negative integer. Also, when x^y = y^x, then (-x)^(-y) = +/- (-y)^(-x)………

The improvement where anolyte containing an aqueous solution of sodium chloride is provided with a concentration by weight of sodium chloride of less than 200 g/l, and the water humidifying the gas containing oxygen is provided sole in the form of water vapour, and maintaining reaction conditions so as to obtain a concentration by weight of sodium hydroxide between the cation-exchange membrane and the cathode of less than 38.8%, which is not bad.

Did you read my paragraph about its functions?

My paragraph (the first one) describes the Ksp constant for solubility product, the nest paragraph(s) are giving Runner the ability to show the experimental skills needed to carry out this test. And yes Runner you have the right idea, anymore questions just fire away!!!!!!!!!!!!1

For example, suppose you find that there are 15.0 grams of the acid in 120 cm3 of water. The solubility would be 15 x 100 /120 grams in 100 g of water. Solubility is usually expressed as grams of solute in 100 g of solvent or in 1 dm3 of solution.

"chemistry" you have failed to mention the basic idea of solubility constant (Ksp) in your link/chemistry club.

Tertiary is the ways in which various elements of secondary structure are arranged to form the overall three dimensional structure of a protein.

Chemical equation time for ya: Determine the concentration of the HCl solution by dividing the number of moles of HCl for each sample by the volume of HCl solution required to reach the endpoint in liters. HCL standard = moles of HCl added / volume in Litres added. Standardization of ~0.1 M HCl solution 1- Obtain a sample of previously dried sodium carbonate (Na2CO3). 2- In three separate 125 mL erlenmeyer flasks, weigh 0.20-0.25 g samples of the dried Na2CO3 to the nearest 0.1 mg on the analytical balances. Record the masses of Na2CO3 on your data sheet. 3- Dissolve each sample of Na2CO3 in about 25 mL of distilled water. Add 3 drops of bromocresol green to each sample. 4- Titrate each sample with the HCl solution until the color changes from blue to green. Once the color change occurs, boil the sample for 2 to 3 minutes, then cool to room temperature. The color of the solution should have gone back to blue. Add a small amount of HCl to the flask until the color changes to green again (Warning!! This second addition will probably be a small amount, use care!!). Record the total amount of HCl added to the nearest 0.01 mL. Discard the solutions in the erlenmeyers and rinse them for later use. Determination of Ksp for Ca(OH)2 5- Dilute the standardized HCl solution by a factor of 10 by diluting 25.00 mL of the standardized HCl solution to 250 mL in a 250 mL volumetric flask. Measure 25 mL of the standardized HCl solution in a 25 mL volumetric pipette. This diluted solution is to be used in future titrations. 6- Empty the buret used in step 4 and rinse it with distilled water. Take a small portion of the diluted HCl solution and rinse the insides of the buret with it. Fill the buret with the diluted HCl solution. 7- Obtain about 75 mL of a saturated Ca(OH)2 solution provided to you in the lab. Take the temperature of the solution with your thermometer and record it. 8- Filter the saturated Ca(OH)2 solution through a piece of filter paper in a long stemmed funnel. Collect about 50 mL of filtered solution (or filtrate) in a 100 mL beaker. 9- Using a 10 mL graduated cylinder, measure out 10.00 mL of the filtered solution. Pour the 10.00 mL of solution into a clean 125 mL erlenmeyer. Add 25 mL of distilled water to the solution and about 3 drops of bromothymol blue. 10- Titrate with the diluted HCl until the color of the solution changes from blue to green. Record the volume of HCl solution added to the nearest 0.01 mL. 11- Repeat steps 9 and 10 two more times for a total of 3 titrations. Rinse out the erlenmeyer flasks after use. 12- Using a 250 mL beaker, heat approximately 100 mL of distilled water to boiling. Add about 2 g of Ca(OH)2 gently to the boiling water and stir for 2 minutes. Record the temperature of the solution to the nearest degree. 13- Quickly filter about 45 mL of this solution. After it is filtered, quickly measure out three 10.00 mL portions of the filtered solution into three 125 mL erlenmeyer flasks. Add 25 mL of distilled water to each flask and let the solutions cool to room temperature. Add 3 drops of bromothymol blue to each flask. 14- Titrate with the diluted HCl until the color of the solution changes from blue to green. Record the volume of HCl solution added to the nearest 0.01 mL.

Americium-241 primarily emits alpha particles, but also emits gamma rays. Americium-241 will throw off an alpha particle. An alpha particle is made up of two protons and two neutrons bound together. In the process of emitting the alpha particle, the americium-241 atom becomes a neptunium-237 atom. The alpha particle leaves the scene at a high velocity. So by alpha decay (Ne), to Np this inclusive decay will discolour your sticker, any better?

You can also use HCL (hydrochloric acid) for the titration.

Bsc (Hons.) Chemistry and currently studing Bsc Applied science with Forensic Science and Crime Scene Science.

In this experiment you will need to measure the concentration of Ca2+(aq) in equilibrium with (delib) soluble Ca(OH)2(s) and then calculate the Ksp (Constant soluble product) for Ca(OH)2. Ca(OH)2 Ca2+ + 2OHKsp = [Ca2+][OH-]2 You will need to Titrate Ca2+ with ethylenediamine tetraacetate. So collect the Ca(OH)2 and then titrate the Ca2+ ions with a solution of ethylenediamine tetraacetate. One mole of ethylenediamine tetraacetate will react with one mole of Ca2+ to form Ca(EDTA)2-, a "complex ion", 1:1 ratio. Ca2+ + EDTA4- Ca(EDTA)2- Is this helping???

I dont know if you are aware of the undergraduate chemistry syllabus, in the UK, i am. I was not just taught to memorise functional groups, the vast knowledge base, is organic chemical theories, to be able to identify a functional group, is the basic knowledge that you need, that is all i was saying.

MrL_JaKiri Chemistry is NOT a subset of Physics at all.

I think it will be the OH (alcohol) group in the toothpaste that will generate the cold "feeling" once mixed with water, just like the cold spray from a deodorant, alcohol and water.

Americium 241 is releasing the alpha particles emmited from the radioactive inclusion, thus will damage and discolour your "glowing sticker" the higher the energy the faster this will occur.

YT2095 hit the spot the hydrogen ion concentration (pH) of water and how it affects the ability of plant growth.

unkown2 are you studying G.C.S.E. (1AC) chem? VendingMenace i must say once you have understood the functional groups in organic chemistry equations are not that bad.

I use the word allegedly as I cannot prove 100%, as I did not see records saying that this occurred, understand?