atomic weights. In the pairs argon and potassium, cobalt andnickel, andtelluriumand iodine, for example, the first element had the greateratomic weightbut the earlier position in the periodic system. The solution to this difficulty was found only when the structure of theatomwas better understood...
Gallium, chemical element of Group 13 (the boron group) of the periodic table. It liquefies just above room temperature. Gallium compounds, some of which form the basis for light-emitting diodes (LEDs), have valuable semiconductor and optoelectronic prop
To learn more about the set you can visit my page about element collecting for a general description and information about how to buy one, or you can see photographs of all the samples from the set displayed on my website in a periodic table layout or with bigger pictures in numerical ord...
Copper Potassium The potassium element is denoted by the symbol K. Iit is a silvery-white soft metal, waxy in nature and it can be cut with a knife easily. It has a low melting boiling point, lower density than water, and active chemical properties. Potassium is present in igneous rocks....
Cesium is an alkali metal, along with lithium, sodium, potassium, rubidium and francium. Alkali metals are highly reactive, have one electron in their outer shell, and do not occur freely in nature, according to ChemicalElements. These metals are also very malleable, ductile and good heat and...
In a concentrated solution of potassium cyanide copper is rendered slightly more vulnerable to oxidation than zinc. Under just the right conditions (cool temperatures and gentle agitation) the oxidizer potassium persulfate, combined with concentrated potassium cyanide, will slowly remove copper without ...
Calcium, phosphorous, magnesium, sodium and potassium constitute major macro elements and iron, selenium, copper, manganese and zinc are micronutrients found in cruciferous vegetables. Approximate composition of these micro and macronutrients in some of the commonly consumed cruciferous vegetables is listed...
Iodine is element 53 on the periodic table, with element symbol I. Iodine is an element you encounter in iodized salt and some dyes. A small amount of iodine is essential for nutrition, while too much is toxic. Here are facts about this interesting, colorful element. ...
De Boisbaudran extracted gallium in the first instance from a zinc blende ore from the Pyrenees and obtained initially only 0.65 grams from 430 kilograms of ore. He isolated gallium by electrolysis of its hydroxide in potassium hydroxide solution. ...
Facts About Aluminum (Image credit: Andrei Marincas | Shutterstock) Aluminum: It's not just found in the refrigerator wrapped around week-old leftovers. This element is the second-most abundant metallic element in Earth's crust aftersilicon. It's used in soda cans and other packaging, in ...