The f-block contain lanthanoids and actinoids chemical elements. The base of classification in blocks is the electron configuration; these elements have many similarities.
The f-block contain the following elements: - lanthanides (atomic number: 57-71) - actinides (atomic number: 89-103)
f block elements (lanthanides and actinides) are placed below the periodic table
s block elements: groups 1-2 d block elements: groups 3-12 p block elements: groups 13-18
s-block elements: groups 1 and 2 p-block elements: groups 13 to 18
The main group elements have fixed valencies but members of the d block have multiple valencies.
Both Ni and Tc are d-block elements (or transition metal elements)
The f-block elements are placed at the bottom of the periodic table because if they were placed where they belong the periodic table would be too big to fit on a normal sheet of paper.
D block elements are at the center of the periodic table; f block elements are at the bottom.
The elements that are placed outside of the periodic table are called transactinides. These elements are usually placed in a separate row below the main table and are synthetic elements that do not occur naturally on Earth.
f-block elements (lanthanides and actinides)
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.
The f-block elements.
Lanthanides and actinides (or f-block elements).
The f-block elements (lanthanides and actinides, the two rows at the bottom of the periodic table) are known as inner transition elements
The periodic table is arranged (1) by increasing atomic number; (2) into groups of elements with similar chemical properties; (3) into periods of elements with the same number of electron shells.
f block elements (lanthanides and actinides) are placed below the periodic table
The two rows of elements placed below the periodic table are known as f block elements. The two rows are also known as lanthanides and actinides. In these elements, the electrons are filled in the antepenaltimate f orbital.
F-block