The d- and f- block elements are the elements whom the electrons entered into the d-orbitals and f-orbitals respectively.

Names of f block elements. 58 Ce- 71 Lu Actinides are the elements in which the last electron enters into 5f. The 5th level of a tetrahedron has 15 units. A block level element has a top and a bottom margin whereas an inline element does not.

These elements are actually formal members of the group three from which they have been taken out to form a separate f block of the periodic table. The block names s p d f originated from descriptions of spectroscopic lines of atomic orbitals. Sharp principal diffuse and fundamental.

N-2 f 1-14 n-1 d 0-2 ns 2. There are two series of the f block elements named as Lanthanide series elements are known as Lanthanides Actinide series elements are known as Actinides These two series are named as such according to the element from which the series starts with. There are 15 elements for the f block Z57 to 71 although an odd number affects the number of orbitals 14 2 7.

In this chapter you will learn about the various properties and general trends which are shown by these elements. A block-level element always starts on a new line. An element block is a set of elements located in adjacent element groups.

A block-level element always takes up the full width available stretches out to the left and right as far as it can. Elements - La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 57-71 Mnemonic - La al C hunari P ehne N ache P yari S o n am E G ori T era D ada H ai E T alli Y e L e Actinide -. The Lanthanides consist of the elements in the f-block of period six in the periodic table.

Charles Janet first applied the term in French. These elements have the general electronic configuration as n-1d 1-10ns1-2 and n-1f1-14n-1d 1-2ns2. Electronic configuration of f block elements.