Discovery of Selenium by Berzelius, Cadmium by Stromeyer, and Lithium by Arfvedson.
In all processes in which the bromo-iodised collodion is employed 2 grains of bromide of cadmium should be added to each ounce of the collodion.
The cadmium and copper absorb the secondary radiation that is similarly produced in the lead.
Cadmium is the metal generally recommended, and the alloy is made by melting together a weighed portion of the gold with five or six times its weight of cadmium in a Berlin crucible and under a thin layer of potassium cyanide.
Cadmium occurs in nature as cadmiumsulphide in greenockite, CdS, which is very rare.
The addition of salts of lead and cadmium was without effect.
The solution containing the cadmium is concentrated by evaporation, and mixed with an excess of oxalic acid and alcohol.
Filter; the filtrate contains the cadmium and, possibly, a small quantity of zinc, from which it is best separated by reprecipitating with sulphuretted hydrogen.
The solution containing the cadmium freed from the other metals is precipitated with sulphuretted hydrogen in a moderately-acid solution.
Cadmium is detected by giving with sulphuretted hydrogen in solutions, not too strongly acid, a yellow precipitate, which is insoluble in solutions of the alkalies, alkaline sulphides, or cyanide of potassium.
Collect and weigh the precipitate as cadmium sulphide, as described under Cadmium.
Sulphide of cadmium is used as a pigment (cadmium yellow); and the metal and some of its salts are useful reagents.
The residue is cadmium sulphide, which contains 77.
The salts of cadmium closely resemble those of zinc.
Cupric sulphide must be even less soluble in water than cadmium sulphide,[418] and there is no difficulty in showing that such is the case.
The precipitation of cadmium sulphide depends on the relation of the product of the concentrations of the cadmium-ion and the sulphide-ion to the solubility-product constant for cadmium sulphide (see the equation, p.
Any immediate precipitation ofcadmium sulphide will be prevented by the addition of 10 c.
The more intense colors of the copper compounds—the black sulphide, the intensely blue cupric-ammonium-ion—mask the cadmium reactions.
To the east there were rocks of a bright cadmium yellow colour, some 45 feet high, with deposits of sand and gravel on them as thick again (45 feet).
Native cadmium sulphide, a mineral occurring in yellow hexagonal crystals, also as an earthy incrustation.
Cadmium is also to be preferred to chrome, because it is of a much finer tonality.
That is because cadmium is expensive and chrome is not permanent.
It is still very much used, but in the simplification of your palette you may as well leave it out, as you can get the same qualities with cadmium and white.
Add orange vermilion and cadmium yellow and orange cadmium, and you have a powerful palette of great range and absolute permanency.
The same holds with yellows and blues, as orange cadmium is a red yellow, and strontian yellow is a greenish yellow.
Greens and yellows made by the admixture of chrome are apt to be crude as compared with those in which cadmium was used.
For richer greens think of the lighter chromes and cadmium yellows or citrons; and for the richer oranges, the deeper cadmiums and chromes.
The cadmium may be extracted by dissolving the ore in sulphuric acid, leaving the solution acidulous, and diluting it with water, then transmitting through it a stream of sulphuretted hydrogen, till the yellow precipitate ceases to fall.
Cadmium has the colour and lustre of tin; and is susceptible of a fine polish.
It contains frequently iron, copper, arsenic, cadmium and silver, all associated with sulphur.
The ammonium and cadmium play a secondary part in the process, and are not absolutely necessary in forming the image.
Illustration] Cadmium follows very closely on the lines of zinc; the pillars of the zinc spike are reproduced in the rings of the cadmium funnel; the globes are also the globes of cadmium; so neither of these needs attention.
The ten-atomed ovoid is the same as in cadmium and follows the same course in breaking up.
The same characteristics of four funnels opening on the faces of a tetrahedron are found in all, but magnesium and sulphur have no central globe, and in cadmium and tellurium the globe has become a cross.
The central cross only differs from that of cadmiumin having a seven-atomed instead of a four-atomed centre.
This group contains magnesium, zinc, cadmium, and mercury, with an empty disk between cadmium and mercury; we did not examine mercury.
Zinc and cadmium of the filtrate are determined as above.
Iron and manganese, when present as protoxide, are dissolved; of iron sesquioxide but traces, and of cadmium oxide in statu nascendi a small portion enter into solution.
The separation of copper from cadmium being difficult and laborious, and the volumetric estimation with potassium cyanide not practicable, it is not prudent to apply this method.
Mixed with cadmium yellow it furnishes a range of brilliant warm yellows.
Its admixture with cadmium results in a fine range of warm luminous tints.
The precipitate of sulphide of cadmium is separated from the solution by filtration, and the filtrate saturated with hydrochloric acid.
This precipitate may contain the sulphides of mercury, copper, cadmium and bismuth.
A plate of cadmiumis mounted in a hard rubber frame and immersed in the electrolyte.
Occasional voltage and cadmium readings of each cell should be taken for the purpose of ascertaining their condition and the behavior of the separate plates.
During charge thecadmium plate reads negative to the negative plate, until the cell is about full, when the reading should be zero; the charge should be continued until the cadmium reads 0.
The test consists in taking voltage readings between the cadmium plate and the positive or negative plates of the cell.
From this point the charging should be prolonged until the pressure, as determined by a voltmeter or a cadmium tester, rises to about 2.
Defn: Native cadmium sulphide, a mineral occurring in yellow hexagonal crystals, also as an earthy incrustation.
In that period of time, he rationalized, he ought to be able to insert a sufficient number of cadmium control rods to bring the pile under control.
Only three cadmium rods when he needed at least three dozen!
Croceous: saffron yellow; yellow with an admixture of red [pale cadmium yellow].
An increased employment of cadmium for industrial purposes is expected to follow.
The use of cadmium is materially restricted by its relatively limited supply.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "cadmium" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: arsenic; gold; iron; lead; metal; poison; silver
