There are seventeen of these. Please see the link.
litium, and elements in the 2nd period (row) are pretty common
It is a rare earth element, never found in mineral deposits (veins and nuggets as with gold) but normally found in assocaition with other elements and minerals.
Hassium is not a rare earth element; but is an artificial element, extremely rare and very difficult to obtain.
promethium
No. The rare earth elements are those whose symbols appear in most wide form periodic tables as a separate row at the bottom of the table, referenced from column 3 period 6. Some consider the actinides also to be rare earth elements. Silver, however is a main group transition element in column 11 and period 5.
rare earth elements
Some rare earth element's are in the food we eat
All the rare earth elements are natural chemical elements (including prometium - element obtained also artificialy).
your TV, smart phone, car, head phones, speakers all use rare earth elements. there are many types of rare earth elements that all have different uses.
litium, and elements in the 2nd period (row) are pretty common
Be; Beryllium Element #4
Curium is a member of the actinoids family.
It is a rare earth element, never found in mineral deposits (veins and nuggets as with gold) but normally found in assocaition with other elements and minerals.
Hassium is not a rare earth element; but is an artificial element, extremely rare and very difficult to obtain.
The rare earth elements are 17 proper elements, consisting of scandium, yttrium and the fifteen lanthanoids.All of the elements in the lanthanide and actinide series are considered "rare earth" elements
Helium is a member of the family of noble gases.
To measure the abundances of rare earth elements in clinopyroxene and olivine of iron-silicon in a fulgurite, were made to determine the oxygen fugacity required.