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Elements 58 to 71 are called the Lanthanides.
Elements between 57 and 70 belongs to the f group. Elements from La - Lu belongs to this group. These are called Lanthanides.These elements are Lanthanides. They are placed separately. They have different chemical properties.
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
77
Manganese is not a rare earth element. The rare earths range from Lanthanum (atomic number 57) to Hafnium (70) and Actinium (89) to Rutherfordium (102). Manganese is atomic number 25. Looking at the periodic table, you will see two rows at the bottom named Lanthanoids and Actinoids - those are the rare earths.
because they are man made.
These elements are termed as 'lanthanides' and 'actinides' have certain different characteristics that cannot be fitted into modern periodic table,hence they are placed at the bottom.
beacause they are rare metals and they help basketball players
Elements 57 through 70 on the Periodic Table are part of the Lanthanide Series
They are lanthanides and actinides. They have different chemical properties , hence they are placed separately.
elements 57 - 70.
Elements 58 to 71 are called the Lanthanides.
Elements between 57 and 70 belongs to the f group. Elements from La - Lu belongs to this group. These are called Lanthanides.These elements are Lanthanides. They are placed separately. They have different chemical properties.
they are not placed from elements 57-70.
These elements are the lanthanides; see the link below for some details.
between Barium and Hafnium
70 - 57 = 13