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Classification Of Elements And Periodicity In Properties

Question

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What is the basic difference between the terms electronegativity and electron gain enthalpy?

Solution

The main points of difference are as:

Electronegativity	Electrogain enthalpy
1. It is the relative tendency of an atom in a molecule to attract the share pair fo electron towards itself in a covalent bond.	1. It is the tendency of an isolated gaseous atom to attract an electron to form a negative ion.
2. It is a number and has no units.	2. It is measured in electron volts/atom or kJ mol^-1.
3. It is the property of a bonded atom.	3. It is a property of an isolated atom.
4. Electronegativity values are only the comparative values.	4. Electron affinity values are the actual values.
5. It changes regularly in a period or group.	5. It does not change regularly in a period or a group.

Some More Questions From Classification of Elements and Periodicity in Properties Chapter

Which property is the basis of long form of periodic table?

How many elements are placed in each period of the p-block?

What is the number of groups in: (i) p-block (ii) d-block?

How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?

What is the name given to the s-block elements?

To which block the element with outer electronic configuration 4s²3d¹⁰ belongs?

Why are there 10 elements in each series of d-block?

In terms of electronic configuration,
what is common in a given period and group?

Give the general electronic configuration of
(i) Transition elements (ii) Inner transition elements.

Name the group and period to which an element with Z = 15 belongs ?

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