Question

Modern periodic table is classified into how many blocks?
(A) 18
(B) 8
(C) 8
(D) 4

Answer 1

Hint :All known elements are organised using the modern periodic table. The elements in the table are grouped in order of increasing atomic number. Each element is defined by its chemical symbol in the modern periodic table. The atomic number of each symbol is shown by the number above it.

Complete Step By Step Answer:
To group all known elements, the modern periodic table is used. The elements in the table are grouped in order of increasing atomic number. Each element is defined by its chemical symbol in the modern periodic table. The atomic number of each symbol is shown by the number above it.
The s-block, the p-block, the d-block, and the f-block are the four blocks that make up the current periodic table of elements. The forms of orbitals that hold the element's valence electrons are used to classify it. Valence electrons in s-orbitals are found in s-block elements, while valence electrons in d-block elements are found in d-orbitals.
THE ELEMENTS OF THE s-BLOCK. The Periodic Table's s-block components are those of which the final electron occupies the outermost s-orbital. Since the s-orbital can only hold two electrons, the s-block of the Periodic Table is divided into two sections (1 & 2).
The p-block is the part of the periodic table that contains columns 3A through 8A but not helium. There are 35 p-block elements, all of which have valence electrons in the p orbital. The p-block elements are a set of elements that have a broad variety of properties.
The elements in the D block are those that can be found in the modern periodic table from the third to the twelfth groups. These elements' valence electrons are located in the d orbital. Transition elements or transition metals are other names for D block elements.
The lanthanides and actinides are the f block elements, and they are known as the inner transition elements owing to their location in the periodic table due to their electron configurations. The electron shell's f orbitals are packed with "n-2." The number of electrons that can occupy the f orbitals is limited to fourteen.

Note :
The s-block, the p-block, the d-block, and the f-block are the four blocks that make up the current periodic table of elements. The forms of orbitals that hold the element's valence electrons are used to classify it. Valence electrons in s-orbitals are found in s-block elements, while valence electrons in d-block elements are found in d-orbitals.