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Why are the lanthanides and actinides placed in the periodic table and why?
Wiki User
∙ 8y ago
The lanthanides are elements 57-71 and are inserted after barium (Ba) on the Periodic Table. The actinides are elements 89-103 and are inserted after radium (Ra) on the periodic table.
The reason they are there is because of the filling of electron orbitals in the atoms of the elements. There are four known orbitals, the s, p, d, and f orbitals. The lanthanide and actinide blocks are the result of electrons being inserted into the f orbitals.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoThe lanthanides and actinides belong in periods six and seven, but are moved down to the bottom so that the table isn't awkwardly long.
Wiki User
∙ 7y agoLanthanides ans actinides are placed under the periodic table; the motivation is of aesthetic nature.
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Where are the lanthanides and actinides placed on the periodic table?
At the bottom of the Periodic Table
Where do lanthanids and actinides fit into the periodic table?
Lanthanides (elements with atomic number 57-71) and actinides (elements with atomic number 89 to 103) are placed at the bottom of the periodic table.
Where do the lanthanides and actinides get their names?
They are the two rows placed at the bottom of the periodic table. The first row is called lanthanides and the second is called actinides. They are also known as f-block elements as the electrons are added in the f-orbitals.
What are the two periods of elements below the periodic table called?
The Lanthanides and the Actinides.
What two groups are removed from the main body of the periodic table?
LAnthanides and actinides
Where are landthanides and actinides actinides placed in the periodic table?
Lanthanides and Actinides are placed separately as the properties of these elements is quite different from the elements in periodic table.
What is the group number for Lanthanides and Actinides?
Rare Earth elements or lanthanides are placed in the period 6 of the periodic table of Mendeleev. Actinoids are placed in the period 7 of the periodic table of Mendeleev.
Where are the lanthanides and actinides places in the periodic table?
they are not placed from elements 57-70.
Why are lanthandies placed below the periodic table?
Lanthanides and actinides are placed below the periodic table because of their unique physical and chemical properties.
Where are the lanthanides and actinides placed on the periodic table?
At the bottom of the Periodic Table
What elements are placed at the bottom of the periodic table?
The periodic table of elements is a chart that organizes the elements and emphasizes their shared traits and commonalities. All the known elements and their atomic number are on the periodic table.
Where do lanthanids and actinides fit into the periodic table?
Lanthanides (elements with atomic number 57-71) and actinides (elements with atomic number 89 to 103) are placed at the bottom of the periodic table.
Which element family is usually shown separated frome the main part of the periodic table?
f block elements (lanthanides and actinides) are placed below the periodic table
What two elements are shown at the bottom of the periodic table?
Lanthanides and Actinides.
What elements on the periodic table is a radioactive element?
Lanthanides and Actinides probably
What is placed at the bottom of the periodic table because they are too wide to represent the chart form?
f-block elements (lanthanides and actinides)
What are at the bottom of the periodic table?
The Lanthanides and the Actinides have been moved in the periodic table simply to save space. --PainRain
