Flashcards for NEET Chemistry - Classification of Elements and Periodicity in Properties

Flashcards for NEET Chemistry are designed to boost your NEET preparation. Find below flashcards for the chapter β€œClassification of Elements and Periodicity in Properties”. These flashcards are prepared as per the NEET syllabus. These are helpful for aspirants of NEET and other exams during last-minute revision. It covers all the important points that are frequently asked in the exam. Check BYJU’S for the full set of Flashcards and Study material for NEET Chemistry.

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Chemistry

Classification of Elements and Periodicity in Properties

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flashcards for neet chemistry nov12 classification of elements and periodicity in properties 1
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Classification of Elements and Periodicity in Properties

s-Block Elements

Have ns1 and ns2 outermost electronic configuration

Group 1 – Alkali metals

Group 2 – Alkaline earth metals

p-Block Elements

Group 13 to 18

The outermost electronic configuration of elements in a period varies from ns2np1 to ns2np6

d-Block Elements

Transition elements

Group 3 to 12 with the outer electronic configuration (n-1)d1-10 ns0-2

f-Block Elements

Inner-transition elements

Lanthanides – Ce(Z = 58) to Lu(Z = 71)

Actinides – Th(Z = 90) to Lr (Z = 103)

outer electronic configuration is (n-2)f1-14 (n-1)d0–1 ns2

Atomic Radius

Generally decreases across a period

Increases as we go down a group

Ionization Enthalpy

The tendency of an element to lose an electron

Generally increases across a period

Decreases as we go down a group

Electron Gain Enthalpy

The tendency of an element to gain an electron

Generally becomes more negative across a period

Becomes less negative as we go down the group

Electronegativity

The tendency of an atom in a compound to attract the shared electrons towards itself

Generally increases across a period

Decreases as we go down a group

Ionic Radius

A cation is smaller than its parent atom

An anion is larger than that of the parent atom

Metallic Radius

Half the internuclear distance between the two adjacent atoms in the metallic crystal

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