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Lanthanides?ærefers to the series of chemical elements that comprise the fifteen metallic chemical elements with atomic number 57 through 71. These elements are known as the rare earth elements.
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Is lathanides unstable?
Lathanides all lathanides have stable isotopes except promethium, promethium is also the only radioactive lathanide element, hope that helped.
Rare earth series of soft malleable metals?
Lathanides
Are lathanides and actinides solid or liquid?
Lanthanides are all solid at room temperature
Why do chemists use a periodic table?
Because all of the elements are displayed; also they are divided into groups (alkali, alkaline earth, transition metals, metalloids, non metals, halogens, noble gases, lathanides and actinides) based on their reactivity, common oxidation states and properties. This helps chemists to think of chemical compounds and their composition (e.g alkali metals usually have +1 oxidation states, alkaline earth +2 and transition +2,+3, but are not limited to these oxidation states).
Which Metals are stored in inert gas?
Any of the reactive metals would require some sort of inert storage - that could be an inert gas, paraffin oil, or you could store them in a tube that has been sealed whilst under vacuum. Of the elements, the most common reactive metals requiring inert gas storage are Lithium Sodium Potassium Rubidium Caesium Calcium Strontium Barium Others include some of the lathanides (such as Europium) and Actinides (such as Uranium) react with air, or the moisture in the air. The other relatively common example of a metal requiring inert storage is sodium-potassium alloy (commonly know an NaK alloy). This is a very reactive liquid at room temperature and watching two of my colleagues dealing with a NaK fire in a fume cupboard at work was one of the most entertaining afternoons of my career!
